Mod rewrite problem with Ubuntu

[eluser]CroNiX[/eluser]
Try this by itself. If it doesn't work, try removing the ?. I use this on Ubuntu 10.04 (except I don't need a RewriteBase). The rest of that is unneeded for CI 2+

Code:

RewriteEngine On
RewriteBase /zayanit/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L]

Also, I think the problem might be with your if blocks. On my server, the extensions are .so, not .c. If you use the above this will probably confirm that.