I exactly follow the user guide instructions and i have my WS Echo, the client and all the described classes. But, when running my EchoClient, i encounter the following exception : Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/soap/FactoryLoader at javax.xml.ws.spi.Provider.provider(Provider.java:91) at javax.xml.ws.Service.(Service.java:83) at echo.EchoService.(EchoService.java:49) at echo.EchoClient.main(EchoClient.java:7) It seems to be a pb with the EchoService constructor but i don't understand why Thanks for helping View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4025977#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...