About five months ago, a user became unable to log in to Citrix. The process stalled at a blank blue desktop. I tried to resolve, but eventually rebuilt the system and the problem was gone. Now, five months later, the problem is back. And I'd rather not rebuild the system again. We're logging in with Citrix Program Neighborhood version 9. Other users can log in. If I change the login name on this users computer, I still cannot get in. He can log in to the Citrix server through remote desktop with no problem. I tried uninstalling and reinstalling the program neighborhood, but it did not resolve the problem. Any suggestions?