I don't have much experience with WebServices (especially JBossWS). But it would help, if you posted the client code where you are using this webservice. Also more details about how you set the classpath and which exact jar files you included in the classpath. P.S: Since this looks specific to JBossWS and not EJB3, you probably will get a better response in the JBossWS forum http://www.jboss.com/index.html?module=bb&op=viewforum&f=200 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4167827#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...