구글맵 v2 logcat오류좀 봐주세요

Question

07-16 18:36:18.263: E/AndroidRuntime(24660): FATAL EXCEPTION: main
07-16 18:36:18.263: E/AndroidRuntime(24660): Process: com.example.iigt, PID: 24660
07-16 18:36:18.263: E/AndroidRuntime(24660): java.lang.NoClassDefFoundError: com.example.iigt.GmapActivity
07-16 18:36:18.263: E/AndroidRuntime(24660):  at com.example.iigt.MainActivity$1.onClick(MainActivity.java:24)
07-16 18:36:18.263: E/AndroidRuntime(24660):  at android.view.View.performClick(View.java:4442)
07-16 18:36:18.263: E/AndroidRuntime(24660):  at android.view.View$PerformClick.run(View.java:18471)
07-16 18:36:18.263: E/AndroidRuntime(24660):  at android.os.Handler.handleCallback(Handler.java:733)
07-16 18:36:18.263: E/AndroidRuntime(24660):  at android.os.Handler.dispatchMessage(Handler.java:95)
07-16 18:36:18.263: E/AndroidRuntime(24660):  at android.os.Looper.loop(Looper.java:136)
07-16 18:36:18.263: E/AndroidRuntime(24660):  at android.app.ActivityThread.main(ActivityThread.java:5103)
07-16 18:36:18.263: E/AndroidRuntime(24660):  at java.lang.reflect.Method.invokeNative(Native Method)
07-16 18:36:18.263: E/AndroidRuntime(24660):  at java.lang.reflect.Method.invoke(Method.java:515)
07-16 18:36:18.263: E/AndroidRuntime(24660):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
07-16 18:36:18.263: E/AndroidRuntime(24660):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:606)
07-16 18:36:18.263: E/AndroidRuntime(24660):  at dalvik.system.NativeStart.main(Native Method)

일단 로그캣 오류는 이렇구요

아래에는 GmapActivity 소스입니다

package com.example.iigt;

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;

public class GmapActivity extends FragmentActivity {

 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.gmap_activity);
     
     
    
 }
 public boolean onCreateOptionsMenu(Menu menu){
  //getMenuInflater().inflate(R.menu.main, menu);
  return true;
 }

}

마지막으로 gmap_activity   XML 파일인데요

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    
    <fragment 
        android:id="@+id/fragment1"
        android:name="com.google.android.gms.maps.MapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
    

</LinearLayout>

도대체 무엇이 문제이죠????