dispatch jax-ws client problem

[Turian Vlad]

Hi all,

in another post: http://www.coderanch.com/t/525005/Web-Services/java/unexpected-XML-tag-JAX-WS , i tried to consume a web service and encountered that problem. it has been on hold since then and i tried some workarounds.
Nothing succesfull yet. My latest workaround was trying to develop a dispatch client like so :

 QName serviceQName =
                new QName("http://webservice.user.modules.project.onepoint/", "users");
        QName portQName = new QName("http://webservice.user.modules.project.onepoint/", "OpUserServiceWebServiceImplPort");
        URL wsdlLocation = new URL("http://192.168.123.26:8080/opproject/soap/users?wsdl");
        Service service = Service.create(wsdlLocation, serviceQName);
 JAXBContext context = JAXBContext.newInstance("com.onepoint_project.webservice");
        Dispatch dispatch =
                service.createDispatch(portQName, context,
                        Service.Mode.PAYLOAD);
        ObjectFactory of = new ObjectFactory();
        GetUser user = new GetUser();
        user.setUserId(4);
        JAXBElement<GetUser> request1 = of.createGetUser(user);
        
        dispatch.invoke(request1);

when i run this code the folowing error appears

Exception in thread "main" javax.xml.ws.soap.SOAPFaultException: null while invoking public onepoint.project.modules.user.OpUser onepoint.project.modules.user.webservice.OpUserServiceWebServiceImpl.getUser(long) with params [null].
	at com.sun.xml.ws.fault.SOAP11Fault.getProtocolException(SOAP11Fault.java:163)
	at com.sun.xml.ws.fault.SOAPFaultBuilder.createException(SOAPFaultBuilder.java:94)
	at com.sun.xml.ws.client.dispatch.DispatchImpl.doInvoke(DispatchImpl.java:174)
	at com.sun.xml.ws.client.dispatch.DispatchImpl.invoke(DispatchImpl.java:193)
	at example.HelloWorldClient.main(HelloWorldClient.java:74)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:115)

I've tried almost everything and any ideas will be greatly appreciated. If you need more info I will be happy to post it.

Thank you all,
Vlad