500 Internal server error (hostgator)

Hi,
'I can't access my Grawlix Panel, I keep getting the above error. I saw another similar post, and im pretty sure it's the htaccess file, but didn't understand what exactly im supposed to change to make the error stop happening?

Please help.

I didn't find the right solution from the Internet.

References:-
http://www.getgrawlix.com/forum/discussion/108/500-internal-server-error-hostgator
Digital production agency

Thanks