.htaccess rewrite rule not sending data
===

I have the following rule - 

> Options +FollowSymLinks  
  RewriteEngine On  
  RewriteCond %{REQUEST_FILENAME} !-f  
  RewriteCond %{REQUEST_FILENAME} !-d  
  RewriteRule (.*) index.php?url=$1 [L]  

while trying to get the $_GET['url'] it gives me nothing, I enabled mod_rewrite but still.  
For example if i enter this url localhost/<script dir>/index/main $url is empty although it should be "index/main"

ubuntu LTS 12.04
apache2