500 Server error from Admin login only.

view story

http://forums.cpanel.net – As far as I know one day my server is fine and the next day its not.. When i try to log in thru the admin panel it gives a 500 server error. I have tried the following.. The site works just fine at domain.com but i cannot log into the backend. 1. Delete the wp-admin directory and replace it... No change. 2. rename the htaccess file to .txt ... No change. 3. Goto Mysql and look at the 3 Users and password... looks ok to be but what do i know... LOL. 4. did not redo the config file since the entire site is working fine and the user and pass and mysql must be ok.. Any ideas that I might check ne (HowTos)