Display Issues on Common Desktop Enviroment CDE

I configured CDE on AIX server and lauched CDE from desktop using reflection 14.1.

I can lauch xclock with my own id
but when i Su to any other id and try xclock it is giving the follwoing error
X connection to localhost:10.0 broken ( explicit kill or server shutdown).

Please elp on this issue.
thanks
Firestar

The ID you are su-ing to, does it have a .xauth or similar directory under it's home directory?

As an alternative you can use "su user_id" instead of "su - user_id" as the previous one retains your environment.