Once you have connected to your Solaris box from Exceed and got a terminal window I imagine that confirming that your DISPLAY variable (to your PCs name/IP address followed by
:0.0 or if you are using SSH and X11 forwarding then
localhost:nn.0 where nn is a 2 digit number from 10 upwards) has been set is the first thing to check, if DISPLAY is not set then set it and then I usually try running something simple like xclock and see if it displays back to the PC?
Without a Solaris box to hand to check I would look at X11 related package versions (
# pkginfo -l pkgname) to see if they give a clue as the to release of X11 they include.