RDP-Black Screen problem

When I try to connect to an XP computer remotely through RDP all I receive is a black screen.

If I logon locally to the machine I was trying to connect to as Admin and then logoff w/ out doin anything….I can then connect remotely.

I do not have a black hole router, the computer is not in a power save mode, I can connect to other computers on the network remotely, and the event log give me an event id# 50.

Anyone have any ideas, advice, and or suggestions.
Your input is greatly appreciated.