[java] webservice in c# e client in java

[ngs]

salve sto tentando di fare comunicare un client fatto in java(axis2 1.4) con un webservice scritto in c#.

codice java :

try{
			hellojaxws.HelloJaxWsStub s = new HelloJaxWsStub("http://localhost:5969/HelloJaxWs.asmx");
			hellojaxws.HelloJaxWsStub.Hello h = new hellojaxws.HelloJaxWsStub.Hello();
			h.setName("Massimo");
			hellojaxws.HelloJaxWsStub.HelloResponse res = s.hello(h);
			System.out.println(res.getHelloResult());
		}catch(Exception ex){
			System.out.println(ex.getMessage());
		}

lo stub l'ho generato con wsdl2java

codice c# :

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;

namespace webservice
{
    /// <summary>
    /// Descrizione di riepilogo per Service1
    /// </summary>
    [WebService(Namespace = "urn:HelloJaxWs")]
    [SoapRpcService()]
    [WebServiceBinding(ConformsTo = WsiProfiles.None)]
    [ToolboxItem(false)]
    public class HelloJaxWs : System.Web.Services.WebService
    {

        [WebMethod]
        public string hello(string name)
        {
            return "Hello World " + name;
        }
    }
}

l'errore che prendo è questo :

The input stream for an incoming message is null.

[org.apache.axis2.transport.TransportUtils.createSOAPMessage(TransportUtils.java:72),
org.apache.axis2.description.OutInAxisOperationClient.handleResponse(OutInAxisOperation.java:353),
org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:416),
org.apache.axis2.description.OutInAxisOperationClient.executeImpl(OutInAxisOperation.java:228),
org.apache.axis2.client.OperationClient.execute(OperationClient.java:163),
hellojaxws.HelloJaxWsStub.hello(HelloJaxWsStub.java:186),
main_test.main(main_test.java:20)]

potreste aiutarmi?