JBoss has its own implementation of JAX-RPC which fits better way in JBOSS WAS stack.
The steps I have back often were:
1. Revise http://community.jboss.org/wiki/JBossWS-JAX-RPCUserGuide documentation.
2. Create specific config.xml as documentation.
3. Edit my ant script to include the generation of files with JBoss WAS wstools
4. Remove the jars from JAX-RPC for my WAR.
5. Test and deploy.