What are you using to set the CLASSPATH? If it's the scripts that come with JBossTS, did you edit them to set the location of your ORB installation?
P.S. don't forget you need the patched version of JacORB from our web site.
Ah, I have updated the set-env.bat file to point to the location of the ORB installation and it now works fine.
I am actually trying to get the transaction manager to work with TIBCO BusinessWorks. I shall create a new thread to discuss this.
BusinessWorks ships with an earlier version of JBossTS (ArjunaTS).