Java EE (Java Enterprise Edition) General Discussion

I am trying to acces my web service using this code

Call call = new Call ();
SOAPMappingRegistry soap = new SOAPMappingRegistry();
call.setTargetObjectURI ("http://tempuri.org/");
call.setMethodName ("EarnNValue");

Vector params = new Vector ();

params.addElement (new Parameter("customer_id", String.class, "gauravbehl",Constants.NS_URI_SOAP_ENC));
params.addElement (new Parameter("channel_id", String.class, "C0002",Constants.NS_URI_SOAP_ENC));

call.setParams (params);
Response resp = call.invoke(new URL("http://203.199.76.2/api/earnnvalue.asmx"), "http://tempuri.org//EarnNValue") ;

if (resp.generatedFault ())
{
Fault fault = resp.getFault ();
System.out.println (" Fault Code = " + fault.getFaultCode ());
System.out.println (" Fault String = " + fault.getFaultString ());
}
else
{
Parameter result = resp.getReturnValue ();
System.out.println (result.getValue ());
out.println (result.getValue ());
}

and i am getting the the following error

Fault Code = soap:Client
Fault String = System.Web.Services.Protocols.SoapException: Server did not recognize the value of HTTP Header SOAPAction: http://tempuri.org//EarnNValue.
at System.Web.Services.Protocols.Soap11ServerProtocolHelper.RouteRequest()
at System.Web.Services.Protocols.SoapServerProtocol.Initialize()
at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean& abortProcessing)

Please help.
Thanx
GB