Cannot Switch Between Users (Fast Switching IS enabled)

[FrumpyJones]

I can get back to the welcome screen. I can click a user to switch
to. It sits there for a bit, then just jumps me back to the user tht
was logged in.

I checked the regedit for allowmultipletssusers (Or whatever it is)
and it is set to 1.

Every time I see this problem they say that's the solution, but not
this time. Anyone have any other ideas?

 

[FrumpyJones]

I should also note this is xp Home with all the most recent updates...