Critical problem on my joomla 1.5

[sultani]

Hello guys, i just installed virtuemart last version, and i just got my joomla installation messed up, i forgot to make a backup and my last backup is from november 24 :S.
Im really lost with this and with my current stress of having my live website down i cant think...
I installed the com_virtuemart.2.0.14.zip and everything was fine, then i installed com_virtuemart.2.0.14_ext_aio.zip and all my pages from frontend  are getting 500 internal server error.

Please help me out
My website is terrachat.com.pt

Thanks

[bytelord]

Tested you site working fine ... if persists check your seo settings and .htaccess file on your joomla sire root folder.

Regards