UBB.threads PHP Forum Software Community Forums UBB.threads 7 Version 7 Support how do I regain control of my HACKED site?

tm-pirate has messed up my site.
The landing page is wrong http://vaguntrader.com/

but the forums are ok http://www.vaguntrader.com/forums/ubbthreads.php

But I have no control over the CONTROL PANEL, when I click on it all I get is the same "hacked" page.