Drupal如何更改url路径

I have server with multiply sites, for example i have domain http://site.com/ and .htaccess file in server root:

RewriteRule ^site.com/ - [L]
RewriteCond %{HTTP_HOST} ^site\.com$
RewriteCond %{DOCUMENT_ROOT}/site%{REQUEST_URI} -d
RewriteRule [^/]$ %{REQUEST_URI}/ [R,L]
RewriteCond %{HTTP_HOST} ^site\.com$
RewriteRule (.*) site.com/$1 [L,QSA]

And i have installed drupal in path: C:/Servers/Web/www/site.com/drupal The problem was that the site links looks - http://site.com/site.com/drupal/user/logout, but i found the $base_url in settings.php, change it and site links looks nice http://site.com/user/logout. But i create new problem - all links redirect me to index.php (not working normaly)

Whats wrong?

Dont Change $base_url>you should not touch that.I think u need a virtual host entry in webserver (for apache httpd.conf)upto C:/Servers/Web/www/site.com