I'm running into exactly the same thing. I have put the following jars in my lib/endorsed directory: jaxb-api.jar jboss-jaxws-ext.jar jboss-saaj.jar xalan.jar | jboss-jaxrpc.jar jboss-jaxws.jar serializer.jar xercesImpl.jar | but I'm still getting the error. Is there one more jar I need, or is something else going on? Of course this is with Java 6. I'll need to get this app working on both Java 6 and Java 1.5. Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4129040#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...