Categories permalink not working (301 loop)

Hi,

I’m currently having an issue with permalinks, I’ve looked through the documentation and forums but found nothing.

Here’s my issue, when I put the default permalink structure (Ex: /?p=123) everything works fine, when I click on a category it shows a list of all posts. But when I put any type or prettylink, it brings me to a wrong redirect page. Thing is, posts permalinks still work perfectly.

Here’s my .htaccess

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /clients/liberte/site/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /clients/liberte/site/index.php [L]
</IfModule>

[EDIT] More infos:

It seems the server sends a loop of 301 Moved Permanently

Thanks !