The site is working fine now (as much as i think it is) and it all got back in order the second i deleted the problem file which is wp-content/plugins/jw-player-plugin-for-wordpress/jwp6/jwplayermodule.php
once i got it out with an ftp program the site got back in order, i placed the file again inside and the site crashed.
i have no idea what is this file and if deleting it was the right thing to do..
