Login problems

Hi 🙂
My blog’s hosted at media temple – my username and password they gave me for my account are in my wp-config.php file, if I change either of the details in there my database at:

http://www.albino-igil.com/blog/

won’t start up so I know they’re correct. However, when I go to log in as admin with the same username and password (I assume this are the correct details to use?) then the page at:

http://www.albino-igil.com/blog/wp-login.php

says “Error: Wrong username”

Am I mistaken in thinking that the details in the wp-config.php file are the same logon details I need to enter as admin?

Any help much appreciated 🙂

Dunk