클라이언트 소스 입니다 ㅠㅠ

근데 이걸 에뮬레이터에 실행시키면 apk 는 에뮬레이터에 등록이 되는데
Log Cat에는 오류가 뜹니다
package kr.hews.Voice;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.URL;
import java.net.URLConnection;

import org.apache.http.util.ByteArrayBuffer;

import socket.client.R;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class TCPClient extends Activity {

    private String html = "";
    private Handler mHandler;
    private Socket socket;
    private String name;
    private BufferedReader networkReader;
    private BufferedWriter networkWriter;
    private String ip = "210.93.87.195"; // IP
    private int port = 9999; // PORT��ȣ
 
    @Override
    protected void onStop() {
        // TODO Auto-generated method stub
        super.onStop();
        try {
            socket.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mHandler = new Handler();
        try {
            setSocket(ip, port);
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }

        checkUpdate.start();
 
        final EditText et = (EditText) findViewById(R.id.EditText01);
        Button btn = (Button) findViewById(R.id.Button01);
        final TextView tv = (TextView) findViewById(R.id.TextView01);
        btn.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                if (et.getText().toString() != null
                        || !et.getText().toString().equals("")) {
 
                    PrintWriter out = new PrintWriter(networkWriter, true);
                    String return_msg = et.getText().toString();
                    out.println(return_msg);
                }
            }
        });
    }

    private Thread checkUpdate = new Thread() {
        public void run() {
            try {
                String line;
                Log.w("ChattingStart", "Start Thread");
                while (true) {
                    Log.w("Chatting is running", "chatting is running");
                    line = networkReader.readLine();
                    html = line;
                    mHandler.post(showUpdate);
                }

            } catch (Exception e) {
            }
        }
    };

    private Runnable showUpdate = new Runnable() {
        public void run() {
            Toast.makeText(TCPClient.this, "Coming word: " + html,
                   Toast.LENGTH_SHORT).show();
        }
    };

    public void setSocket(String ip, int port) throws IOException {
        try {
            socket = new Socket(ip, port);
            networkWriter =
new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
            networkReader =
new BufferedReader(new InputStreamReader(socket.getInputStream()));
       } catch (IOException e) {
            System.out.println(e);
            e.printStackTrace();
        }
    }
}


이건 클라이언트 소스 입니다.


그러나 Log Cat에는
주 에러가 
AndroidRuntime    ERROR : thread attach failed 이거에요 ㅠ
쓰레드 문제인건 알겠는데 뭐가 문제인지는 잘 모르게써요 ㅠ

진짜 초짜라서 그러니 제발 설명 부탁드려요