Hello! Thanks for your fast answer, but i'm already using the endorsed mechanism and I'm notifying the virtual machine where jboss' endorsed jars are: java -Djava.endorsed.dirs=C:\...\jboss-4.0.5.GA\lib\endorsed -Djavax.xml.rpc.ServiceFactory=org.jboss.ws.jaxrpc.ServiceFactoryImpl -cp build;lib\jboss-saaj.jar;lib\jboss-backport-concurrent.jar;lib\jboss-xml-binding.jar;lib\jbossretro-rt.jar;lib\activation.jar;lib\concurrent.jar;lib\wsdl4j.jar;lib\jboss-jaxrpc.jar;lib\jbossws14-client.jar;lib\jboss-common-client.jar;... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4001680#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...