调用.net的webservice

4.0.3程序private String ws(){
     String result="";
     try{
     SoapObject request=new SoapObject(NAMESPACE,MEHTODNAME);//NameSpace
    
     request.addProperty("i","5");
     request.addProperty("j", "6");
    
     SoapSerializationEnvelope envelope=new SoapSerializationEnvelope(
     SoapEnvelope.VER11);
    
     envelope.dotNet=true;
    
     envelope.setOutputSoapObject(request);
    
     HttpTransportSE ht=new HttpTransportSE(URL);
    
     ht.call(SOAPACTION, envelope);    //到这一步就异常 找不到原因
  
     if(envelope.getResponse()!=null){
     SoapPrimitive response=(SoapPrimitive)envelope.getResponse();
     result=response.toString();
     }
    
     }catch(Exception e){
     result=e.getMessage();
     }
     return result;
    }