SMF Install problem

[kierjr]

I installed the forums fine, and it shows up alright for me once I've installed them.

But when I click on "Profile" or "Logout", it sits there for a moment saying 'Waiting', then says it's Done but it just shows a blank page.
It does this to people trying to go to the site aswell.

66.7.222.50/~kiejrcom/4um

I'm not sure what to do, help would be really appreciated because I love these forums.