[EMERGENCY] My site was hacked!!
 

I need help, my site was hacked!!! I don't know HOW. Im the only adm, and I never share my passwords.

The hacker only modify the root, I mean the forum.php, the database is intact and the other files to. The problem is with forum.php

I leave here a pic.

http://img198.imageshack.us/img198/1789/dibujodvb.jpg