I've same problem
here are log error from Apache:
[Fri Mar 06 15:39:53 2009] [notice] Apache/2.2.9 (Win32) DAV/2 mod_ssl/2.2.9 OpenSSL/0.9.8i mod_autoindex_color PHP/5.2.6 configured -- resuming normal operations
[Fri Mar 06 15:39:53 2009] [notice] Server built: Jun 14 2008 19:02:12
[Fri Mar 06 15:39:53 2009] [notice] Parent: Created child process 2492
[Fri Mar 06 15:39:55 2009] [notice] Child 2492: Child process is running
[Fri Mar 06 15:39:55 2009] [notice] Child 2492: Acquired the start mutex.
[Fri Mar 06 15:39:55 2009] [notice] Child 2492: Starting 250 worker threads.
[Fri Mar 06 15:39:55 2009] [notice] Child 2492: Starting thread to listen on port 443.
[Fri Mar 06 15:39:55 2009] [notice] Child 2492: Starting thread to listen on port 80.
[Fri Mar 06 15:41:35 2009] [error] [client 127.0.0.1] File does not exist: C:/xampp/htdocs/w
[Fri Mar 06 15:42:01 2009] [error] [client 127.0.0.1] WordPress database error Table 'wpmu.wp_blogs' doesn't exist for query SELECT * FROM wp_blogs WHERE domain = 'inkara.com' made by require, include, include_once, require_once, require_once, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:01 2009] [error] [client 127.0.0.1] WordPress database error Table 'wpmu.wp_sitemeta' doesn't exist for query SELECT meta_value FROM wp_sitemeta WHERE site_id = 1 AND meta_key = 'site_name' made by require, include, include_once, require_once, require_once, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:01 2009] [error] [client 127.0.0.1] WordPress database error Table 'wpmu.wp_blogs' doesn't exist for query SELECT blog_id FROM wp_blogs LIMIT 0,1 made by require, include, include_once, require_once, require_once, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:01 2009] [error] [client 127.0.0.1] WordPress database error Table 'wpmu.wp_sitemeta' doesn't exist for query SELECT meta_value FROM wp_sitemeta WHERE meta_key = 'fileupload_maxk' AND site_id = 1 made by require, include, include_once, require_once, include_once, require_once, require_once, get_site_option, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:02 2009] [error] [client 127.0.0.1] WordPress database error Table 'wpmu.wp_sitemeta' doesn't exist for query SELECT meta_value FROM wp_sitemeta WHERE meta_key = 'bp-xprofile-base-group-name' AND site_id = 1 made by require, include, include_once, require_once, include_once, get_site_option, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:02 2009] [error] [client 127.0.0.1] WordPress database error Table 'wpmu.wp_sitemeta' doesn't exist for query SELECT meta_value FROM wp_sitemeta WHERE meta_key = 'bp-xprofile-fullname-field-name' AND site_id = 1 made by require, include, include_once, require_once, include_once, get_site_option, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:02 2009] [error] [client 127.0.0.1] WordPress database error Table 'wpmu.wp_site' doesn't exist for query SELECT path FROM wp_site WHERE id = 1 made by require, include, include_once, require_once, get_template_directory, get_template, apply_filters, call_user_func_array, bp_core_force_buddypress_theme, bp_core_set_uri_globals, bp_core_get_site_path, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:02 2009] [error] [client 127.0.0.1] WordPress database error Table 'wpmu.wp_sitemeta' doesn't exist for query SELECT meta_value FROM wp_sitemeta WHERE meta_key = 'active-member-theme' AND site_id = 1 made by require, include, include_once, require_once, get_template_directory, get_template, apply_filters, call_user_func_array, bp_core_force_buddypress_theme, get_site_option, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:02 2009] [error] [client 127.0.0.1] WordPress database error Table 'wpmu.wp_sitemeta' doesn't exist for query SELECT meta_value FROM wp_sitemeta WHERE meta_key = 'active-member-theme' AND site_id = 1 made by require, include, include_once, require_once, get_stylesheet_directory, get_stylesheet, apply_filters, call_user_func_array, bp_core_force_buddypress_stylesheet, get_site_option, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:07 2009] [error] [client 127.0.0.1] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE user_id = 1 AND blog_id = 1' at line 1 for query SELECT count(id) FROM WHERE user_id = 1 AND blog_id = 1 made by require, include, step3, wpmu_create_blog, add_user_to_blog, do_action, call_user_func_array, bp_blogs_add_user_to_blog, bp_blogs_record_blog, BP_Blogs_Blog->save, BP_Blogs_Blog->exists, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:07 2009] [error] [client 127.0.0.1] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '( user_id, blog_id ) VALUES ( 1, 1 )' at line 1 for query INSERT INTO ( user_id, blog_id ) VALUES ( 1, 1 ) made by require, include, step3, wpmu_create_blog, add_user_to_blog, do_action, call_user_func_array, bp_blogs_add_user_to_blog, bp_blogs_record_blog, BP_Blogs_Blog->save, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:07 2009] [error] [client 127.0.0.1] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE blog_id = 1 AND meta_key = 'name'' at line 1 for query SELECT * FROM WHERE blog_id = 1 AND meta_key = 'name' made by require, include, step3, wpmu_create_blog, add_user_to_blog, do_action, call_user_func_array, bp_blogs_add_user_to_blog, bp_blogs_record_blog, bp_blogs_update_blogmeta, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:07 2009] [error] [client 127.0.0.1] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '( blog_id, meta_key, meta_value ) VALUES ( 1, 'name', 'Inkara.com Blogs' )' at line 1 for query INSERT INTO ( blog_id, meta_key, meta_value ) VALUES ( 1, 'name', 'Inkara.com Blogs' ) made by require, include, step3, wpmu_create_blog, add_user_to_blog, do_action, call_user_func_array, bp_blogs_add_user_to_blog, bp_blogs_record_blog, bp_blogs_update_blogmeta, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:07 2009] [error] [client 127.0.0.1] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE blog_id = 1 AND meta_key = 'description'' at line 1 for query SELECT * FROM WHERE blog_id = 1 AND meta_key = 'description' made by require, include, step3, wpmu_create_blog, add_user_to_blog, do_action, call_user_func_array, bp_blogs_add_user_to_blog, bp_blogs_record_blog, bp_blogs_update_blogmeta, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:07 2009] [error] [client 127.0.0.1] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '( blog_id, meta_key, meta_value ) VALUES ( 1, 'description', 'Just another Inkar' at line 1 for query INSERT INTO ( blog_id, meta_key, meta_value ) VALUES ( 1, 'description', 'Just another Inkara.com weblog' ) made by require, include, step3, wpmu_create_blog, add_user_to_blog, do_action, call_user_func_array, bp_blogs_add_user_to_blog, bp_blogs_record_blog, bp_blogs_update_blogmeta, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:07 2009] [error] [client 127.0.0.1] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE blog_id = 1 AND meta_key = 'last_activity'' at line 1 for query SELECT * FROM WHERE blog_id = 1 AND meta_key = 'last_activity' made by require, include, step3, wpmu_create_blog, add_user_to_blog, do_action, call_user_func_array, bp_blogs_add_user_to_blog, bp_blogs_record_blog, bp_blogs_update_blogmeta, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:07 2009] [error] [client 127.0.0.1] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '( blog_id, meta_key, meta_value ) VALUES ( 1, 'last_activity', '1236332527' )' at line 1 for query INSERT INTO ( blog_id, meta_key, meta_value ) VALUES ( 1, 'last_activity', '1236332527' ) made by require, include, step3, wpmu_create_blog, add_user_to_blog, do_action, call_user_func_array, bp_blogs_add_user_to_blog, bp_blogs_record_blog, bp_blogs_update_blogmeta, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:08 2009] [error] [client 127.0.0.1] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE user_id = 1 AND blog_id = 1' at line 1 for query SELECT count(id) FROM WHERE user_id = 1 AND blog_id = 1 made by require, include, step3, wpmu_create_blog, do_action, call_user_func_array, bp_blogs_record_blog, BP_Blogs_Blog->save, BP_Blogs_Blog->exists, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:08 2009] [error] [client 127.0.0.1] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '( user_id, blog_id ) VALUES ( 1, 1 )' at line 1 for query INSERT INTO ( user_id, blog_id ) VALUES ( 1, 1 ) made by require, include, step3, wpmu_create_blog, do_action, call_user_func_array, bp_blogs_record_blog, BP_Blogs_Blog->save, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:08 2009] [error] [client 127.0.0.1] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE blog_id = 1 AND meta_key = 'name'' at line 1 for query SELECT * FROM WHERE blog_id = 1 AND meta_key = 'name' made by require, include, step3, wpmu_create_blog, do_action, call_user_func_array, bp_blogs_record_blog, bp_blogs_update_blogmeta, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:08 2009] [error] [client 127.0.0.1] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '( blog_id, meta_key, meta_value ) VALUES ( 1, 'name', 'Inkara.com Blogs' )' at line 1 for query INSERT INTO ( blog_id, meta_key, meta_value ) VALUES ( 1, 'name', 'Inkara.com Blogs' ) made by require, include, step3, wpmu_create_blog, do_action, call_user_func_array, bp_blogs_record_blog, bp_blogs_update_blogmeta, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:08 2009] [error] [client 127.0.0.1] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE blog_id = 1 AND meta_key = 'description'' at line 1 for query SELECT * FROM WHERE blog_id = 1 AND meta_key = 'description' made by require, include, step3, wpmu_create_blog, do_action, call_user_func_array, bp_blogs_record_blog, bp_blogs_update_blogmeta, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:08 2009] [error] [client 127.0.0.1] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '( blog_id, meta_key, meta_value ) VALUES ( 1, 'description', 'Just another Inkar' at line 1 for query INSERT INTO ( blog_id, meta_key, meta_value ) VALUES ( 1, 'description', 'Just another Inkara.com weblog' ) made by require, include, step3, wpmu_create_blog, do_action, call_user_func_array, bp_blogs_record_blog, bp_blogs_update_blogmeta, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:08 2009] [error] [client 127.0.0.1] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE blog_id = 1 AND meta_key = 'last_activity'' at line 1 for query SELECT * FROM WHERE blog_id = 1 AND meta_key = 'last_activity' made by require, include, step3, wpmu_create_blog, do_action, call_user_func_array, bp_blogs_record_blog, bp_blogs_update_blogmeta, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:08 2009] [error] [client 127.0.0.1] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '( blog_id, meta_key, meta_value ) VALUES ( 1, 'last_activity', '1236332528' )' at line 1 for query INSERT INTO ( blog_id, meta_key, meta_value ) VALUES ( 1, 'last_activity', '1236332528' ) made by require, include, step3, wpmu_create_blog, do_action, call_user_func_array, bp_blogs_record_blog, bp_blogs_update_blogmeta, referer: http://inkara.com/wpmu/
[Fri Mar 06 15:42:20 2009] [alert] [client 127.0.0.1] C:/xampp/htdocs/wpmu/.htaccess: Invalid command 'RewriteEngine', perhaps misspelled or defined by a module not included in the server configuration, referer: http://inkara.com/wpmu/index.php
[Fri Mar 06 15:51:47 2009] [error] [client 127.0.0.1] File does not exist: C:/xampp/htdocs/inkara
[Fri Mar 06 15:51:55 2009] [alert] [client 127.0.0.1] C:/xampp/htdocs/wpmu/.htaccess: Invalid command 'RewriteEngine', perhaps misspelled or defined by a module not included in the server configuration