consume asp.net webservice in android....help required....

Hello Everyone i have issue regarding consume a asp.net(.asmx) webservice in my android application.

i am using ksoap2 and eclipse IDE

my code is................

package hello.webs;

import java.io.IOException;

import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import org.xmlpull.v1.XmlPullParserException;

import android.app.Activity;
import android.os.Bundle;

public class SignIN extends Activity {
/** Called when the activity is first created. */
private static final String NAMESPACE = "http://tempuri.org/";
private static final String URL = "http://xx.xx.xx.xx/xxxxxx/services/webservice1.asmx";
private static final String SOAP_ACTION = "http://tempuri.org/SignIn";
private static final String METHOD_NAME = "SignIn";

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.main);
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.setOutputSoapObject(request);
envelope.encodingStyle=SoapSerializationEnvelope.XSD;
envelope.dotNet = true;
HttpTransportSE androidHttpTransport = new HttpTransportSE (URL);
try {
androidHttpTransport.call(SOAP_ACTION, envelope); //Error comes here
SoapObject resultsRequestSOAP = (SoapObject) envelope.bodyIn;

} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (XmlPullParserException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}
}

The following error comes in XmlPullParserException

org.xmlpull.v1.XmlPullParserException: expected: START_TAG {http://schemas.xmlsoap.org/soap/envelope/}Envelope (position:START_TAG @1:6 in java.io.InputStreamReader@43e519b8)

my webservice soap 1.1 request is like following

<?xml version="1.0" encoding="utf-8"?>

string
string

string
string