Problem with qTranslate and post categories

Hi, I have a problem on the site http://mko-arogi.gr/category/drastiriotites/.

I use the qTranslate plugin and on the categories page (like the link above) the post that are under this category are not shown, and is shown 404 page.

If you check this link http://mko-arogi.gr/ you can see the recent post on the sidebar wich are not shown on the category page (http://mko-arogi.gr/category/drastiriotites/)

How can I solve this problem?

http://wordpress.org/plugins/qtranslate/