无法创建SoapPrimitive对象的对象

Question

SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
                    //Property which holds input parameters
                    PropertyInfo celsiusPI = new PropertyInfo();
                    //Set Name
                    celsiusPI.setName("userotp");
                    //Set Value
                    celsiusPI.setValue(number);
                    //Set dataType
                    celsiusPI.setType(String.class);
                    //Add the property to request object
                    request.addProperty(celsiusPI);
                    //Create envelope
                    SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
                            SoapEnvelope.VER11);
                    envelope.dotNet = true;
                    //Set output SOAP object
                    envelope.setOutputSoapObject(request);
                    //Create HTTP call object
                    HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
                    try {
                        //Invole web service+   
                        androidHttpTransport.call(SOAP_ACTION, envelope);
                        //Get the response
                        output="Envelop";
                        SoapPrimitive response = (SoapPrimitive) envelope.getResponse();// error at these line
                        //Assign it to fahren static variable
                    } catch (Exception e) {
                        output=e.getMessage();
                        e.printStackTrace();
                    }

这是我的代码。问题是在getresponse方法的帮助下创建soapPrimitve类的对象。在调试时它会捕获阻塞但不会给出任何异常。请帮帮我。