I am running FC4T3 on my desk top, and FC2 on two other computers. When I ssh into one of the FC2 computers from the FC4 and try to run any gui app (eg:xclock), I get the message : "Error: Can't open display:" I then try to specifically set the DISPLAY and still get the same message: [chandana@tarzan chandana]$ export DISPLAY=10.10.10.11:0.0 [chandana@tarzan chandana]$ xclock Error: Can't open display: 10.10.10.11:0.0 This works fine (without even bothering to set the DISPLAY) from the other FC2 computer. Is there some permission setting on the FC4 that is different ? Chandana