Problem when connecting

Hi ..

I have a problem when connecting to my dashboard ..
it’s a kind of an article directory, you can try to register here

http://www.youtips.net/tips/wp-login.php?action=register

just pick a name and put the email address, and click register, you will see the error ..

I get a blank page .. so I can’t access my dashboard ..

I contacted the hosting provider, and it seems that there is no problem whith the database ..

Any ideas ? I really need help here guys ..
Will be thankful ..