Login to dashboard problem

Hello – I am having problems with my login screen.
1)Press Login —> http://www.andrewstern.info
2)Type in user & pass —> http://www.andrewstern.info/wp-login.php
3)BLANK SCREEN —> http://www.andrewstern.info/wp-login.php
????

I’ve tried typing in “www.andrewstern.info/wp-admin.php”
and same thing, it just says done on the bottom and it’s BLANK. It seems like it won’t make the jump from the login to the dashboard. If you enter a wrong pass or user it comes up with invalid user\pass liek normal.

It has been working until last night. There has been no changes to the server or any files. Except for that I added the adsensemanager plugin but I never got to activate it. I deleted that and it still doesn’t work.
-Any ideas????

Thanks for your help in advance.