There are many people asking about the same problem: they click the psclient application (or pssetup or anything else),and it does not start.
The application appears in dock only briefly or the dock makes space for it but the icon does not appear at all. The application does not crash, no window appears.
This usually means that the permissions on the application are wrong - it is not executable. This is related to the unix base of Mac OS X, not the shiny Aqua interface most people know.
For information how to fix the permissions see the Chaos\' thread about running PlaneShift on OS X.
