Hi
Some of these may sound like odd questions, but I suspect there may be some problems with security in the client library.
First of all, could you please post or attach the first 100 lines or so of your stack trace?
Here are a couple of questions:
1) Do you have any logging configured in your client?
2) What version of JBossWS are you using?
3) How did you resolve your Class cast issue. And how are you defining your client classpath?