No, client doesn't have org.jnp.server.* package. this class should be downloaded from server dynamically during invocation. I bind jboss to 0.0.0.0 interface, the servlet problem seems solved. but I get another XPath problem. I can evaluate xpath standalone, but can't in the container enviroment. some syntax is not allowed. this one is illegal. string-length(/ns3:orderOperationResponse/ns2:orderOut/clientID)>0 this one is legal. /ns3:ticketsOperationResponse/ns2:ticketsOut/totalPrice>0 strange. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4129862#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...