I would suggest that you migrate to JBossWS. JBossWS4EE was based on Axis, which did not have Schema support and therefore suffered a lot from type binding problems. These issues are resolved in the new stack, since it is fully schema aware.
Both stacks use the same J2EE1.4 development model , so you should not experience any migration problems.
We started a migration page:
Please feel free to share your experience with others.
The different SOAP stacks and installation instructions can be found here: