configure web service .asmx with nusoam in php

Hi, i'm a italian Student. sorry for my english.
this is the class of , my service:



[WebMethod]

    public void insertDataInRepository(String RDFData)

    {

 

        Repository repo = new HTTPRepository("http://localhost:8500/openrdf-sesame", "11");

        try

        {

            repo.initialize();

            RepositoryConnection con = repo.getConnection();

            if (rdfContent != null)

            {


                java.io.StringReader sr = new java.io.StringReader(rdfContent);



                try

                {

                    con.add(sr, "", RDFFormat.RDFXML);

                    con.commit();

                }

                catch (RDFParseException e1)

                {

                    e1.printStackTrace();

                }


                con.close();

                repo.shutDown();

            }

        }

        catch (Exception e)

        {

            System.Console.Error.WriteLine("Caught Exception: ");

            java.lang.Throwable.instancehelper_printStackTrace(e);

        }

    }

    //fine web method

this is, my file php



<?php

require_once('libs/nusoap.php'); 


$client=new SoapClient('http://localhost:1286/WebSite1/Service.asmx?WSDL');


$RDFData=array('<?xml version="1.0" encoding="utf-8"?>

<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">

  <soap:Body>

    <insertDataInRepository xmlns="http://tempuri.org/">

      <RDFData>string</RDFData>

    </insertDataInRepository>

  </soap:Body>

</soap:Envelope>');



$return=$client->call('insertDataInRepository',$RDFData);

print_r($return);

?>

when calling the php file I get this error


Array

(

    [faultcode] => soap:Client

    [faultstring] => System.Web.Services.Protocols.SoapException: Valore dell'intestazione HTTP non riconosciuto dal server SOAPAction: .

   in System.Web.Services.Protocols.Soap11ServerProtocolHelper.RouteRequest()

   in System.Web.Services.Protocols.SoapServerProtocol.RouteRequest(SoapServerMessage message)

   in System.Web.Services.Protocols.SoapServerProtocol.Initialize()

   in System.Web.Services.Protocols.ServerProtocol.SetContext(Type type, HttpContext context, HttpRequest request, HttpResponse response)

   in System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean& abortProcessing)

    [detail] => 

)