WordPress MU

Warning: require_once(wp-includes/wp-db.php) [function.require-once]: failed to open stream: No such file or directory in /home/gblues/public_html/blogs/index-install.php on line 459

Fatal error: require_once() [function.require]: Failed opening required 'wp-includes/wp-db.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/gblues/public_html/blogs/index-install.php on line 459

Does anyone know how to fix this?

Thanks!!!!

Re-upload your WPMU files and folders to server.

Probably your file permissions are messed up. Make sure permissions on your files are at least readable by everyone. During the installation, it is recommended to make them all writable, then revert to read only after install.