WordPress MU

hi
i installed wpmu, and as i create a new page and save and publish it
it gives me a url : http://xxxxxxx/page1
but as i try to visit it, it won't load?
is it any thing i should set?permision?

also these links : http://xxxxxxxxx/2008/11/08/hello-world/
will not work

plz help me

Enable mod_rewrite on your server.

RewriteEngine On
RewriteBase "/"

#uploaded files
RewriteRule ^(.*/)?files/$ index.php [L]
RewriteRule ^(.*/)?files/(.*) wp-content/blogs.php?file=$2 [L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule . - [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-.*) $2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]
RewriteRule . index.php [L]

<IfModule mod_security.c>
<Files async-upload.php>
SecFilterEngine Off
SecFilterScanPOST Off
</Files>
</IfModule>

So that's the default htaccess file...same as everyone else's.

If mod_rewrite is not enabled, it won't get read.

if other server setting are not correct (AllowFile Override) it won't get read.