Thanks for the response!
Now, connecting to the SuSE server as myself (using my username) allows me to run xclock.
However, when I sudo to root (sudo bash) the display error is back (Error: Can't...
I'm using my Ubuntu 10.04 client connected via SSH to a SuSE Linux server (SuSE Linux Enterprise Server 11 (x86_64) version 11 patchlevel=1).
I'm trying to run an install of WebSphere...