Not able to connect and execute Android Web services

I have created java activity.. like below... But my code doesn't work


package com.web.ws;

import java.io.IOException;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.PropertyInfo;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import org.ksoap2.serialization.SoapPrimitive;
import org.xmlpull.v1.XmlPullParserException;

public class WSActivity extends Activity {
    /** Called when the activity is first created. */
	
	private static final String SOAP_ACTION = "http://tempuri.org/GetDepCode";
	private static final String METHOD_NAME = "GetDepCode";
	private static final String NAMESPACE = "http://tempuri.org/";
	private static final String URL = "http://localhost:100/Service.asmx";
	TextView tv;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        tv=(TextView)findViewById(R.id.tv);
        
        SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
        PropertyInfo pi = new PropertyInfo();
        pi.setName("QCode");
        pi.setValue("0473");
        pi.setType(PropertyInfo.INTEGER_CLASS);

SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
		//envelope.dotNet = true;
		envelope.setOutputSoapObject(request);
		
		
		
		HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
		androidHttpTransport.debug = true;
		try {	
			androidHttpTransport.call(SOAP_ACTION, envelope);
			SoapPrimitive sp=SoapPrimitive)envelope.getResponse(); 
			tv.setText("Value:"+sp);
			} 
		catch (IOException e) {e.printStackTrace();	}
                catch (XmlPullParserException e) {e.printStackTrace();}
	
    }
}


and Manifest


<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    package="com.web.ws"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minsdkversion="15" />
    <uses-permission android:name="android.permission.INTERNET" />

    <application>
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity>
            android:name=".WSActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>