Cannot RDP to XP Pro system

I've got an XP pro system in a domain. On the XP I can rdp out to the server

successfully. On the server I cannot rdp to the XP system. I fill in the

server name, or the ip address -it doesn't matter, and click on connect. The

connection window refreshes itself and that is all that happens. Port 3389

is configured in the firewall on both systems. The RDP capability is

configured on the XP system and the appropriate user has been granted

permission to log on to the system. There are no policy problems. And 5

other workstations in the domain work as expected. It is just this one

system that cannot be RDPed to.

Anybody have any ideas?

Denny