ایا واقعا کسی از اساتید هست تو سایت؟؟؟

یه پروژه گرفتم هیچ اروری نداره ولی کرش میکنه دلیلشم نمیدونم میدونین شما؟

 package ir.mahroid.curse.wow;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.widget.TextView;


public class Client extends Activity {

    private ServerSocket    serverSocket;

    Handler                 updateConversationHandler;

    Thread                  serverThread = null;

    private TextView        text;

    public static final int SERVERPORT   = 6000;


    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        text = (TextView) findViewById(R.id.et);

        updateConversationHandler = new Handler();

        this.serverThread = new Thread(new ServerThread());
        this.serverThread.start();

    }


    @Override
    protected void onStop() {
        super.onStop();
        try {
            serverSocket.close();
        }
        catch (IOException e) {
            e.printStackTrace();
        }
    }


    class ServerThread implements Runnable {

        @Override
        public void run() {
            Socket socket = null;
            try {
                serverSocket = new ServerSocket(SERVERPORT);
            }
            catch (IOException e) {
                e.printStackTrace();
            }
            while ( !Thread.currentThread().isInterrupted()) {

                try {

                    socket = serverSocket.accept();

                    CommunicationThread commThread = new CommunicationThread(socket);
                    new Thread(commThread).start();

                }
                catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }


    class CommunicationThread implements Runnable {

        private Socket         clientSocket;

        private BufferedReader input;


        public CommunicationThread(Socket clientSocket) {

            this.clientSocket = clientSocket;

            try {

                this.input = new BufferedReader(new InputStreamReader(this.clientSocket.getInputStream()));

            }
            catch (IOException e) {
                e.printStackTrace();
            }
        }


        @Override
        public void run() {

            while ( !Thread.currentThread().isInterrupted()) {

                try {

                    String read = input.readLine();

                    updateConversationHandler.post(new updateUIThread(read));

                }
                catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

    }


    class updateUIThread implements Runnable {

        private String msg;


        public updateUIThread(String str) {
            this.msg = str;
        }


        @Override
        public void run() {
            text.setText(text.getText().toString() + "Client Says: " + msg + "\n");
        }

    }

}

این سورس کد مانی

 <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="ir.mahroid.curse.wow"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />
    android:targetSdkVersion="17" />

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

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".Clinet"
            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>

فست