안녕하세요. 어제부터 optionmenu와 contextmenu랑 싸우고 있습니다.

그런데 이제 마지막 단계에서 걸려버리네요.

소스코드는 아래와 같습니다.

 @Override
 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo){
  getMenuInflater().inflate(R.menu.context_menu, menu);
  super.onCreateContextMenu(menu, v, menuInfo);
 
 }
 
 @Override
 public boolean onContextItemSelected(MenuItem item) {
  list = (ListView)findViewById(android.R.id.list);
  
  AdapterContextMenuInfo info = null;
  
  info = (AdapterContextMenuInfo)item.getMenuInfo();
  
  switch(item.getItemId()){
  
  case R.id.insert:
   
   Intent intent = new Intent(getApplicationContext(), DbModify.class);
   intent.putExtra("SendData", info.id);   //info.id는 id 값으로 3을 DbModify로 전달합니다.
   startActivity(intent);  //여기서 에러가 발생합니다.
   break;
  
  case R.id.delete:
  
   dbAdapter.deleteNote_context(info.id);
   
   break;
  }
  
     Cursor c = dbAdapter.fetchAllNotes();
     startManagingCursor(c);
     mAdapter.changeCursor(c);
  
  return true;
 }

위에서 Intent 관련한 아래 코드는 DB에 있는 특정 레코드 값을 다른 창으로 출력해줄 때, 사용했던 코드 입니다.
그래서 이번에도 contextmenu에서 사용해 봤는데..잘 되지 않네요. 고수님들의 조언을 기다리겠습니다.

   Intent intent = new Intent(getApplicationContext(), DbModify.class);
   intent.putExtra("SendData", info.id);
   startActivity(intent);

LogCat에서 보여주는 오류 내용 입니다.
08-27 05:36:35.701: INFO/ActivityManager(53): Displayed activity com.example.pointcardMain/.PointcardName: 952 ms (total 952 ms)
08-27 05:36:47.961: INFO/ActivityManager(53): Starting activity: Intent { cmp=com.example.pointcardMain/.DbModify (has extras) }
08-27 05:36:56.062: DEBUG/AndroidRuntime(333): Shutting down VM
08-27 05:36:56.062: WARN/dalvikvm(333): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
08-27 05:36:56.062: ERROR/AndroidRuntime(333): Uncaught handler: thread main exiting due to uncaught exception
08-27 05:36:56.241: ERROR/AndroidRuntime(333): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.pointcardMain/com.example.pointcardMain.DbModify}; have you declared this activity in your AndroidManifest.xml?
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1404)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1378)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at android.app.Activity.startActivityForResult(Activity.java:2749)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at android.app.Activity.startActivity(Activity.java:2855)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at com.example.pointcardMain.PointcardName.onContextItemSelected(PointcardName.java:90)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at android.app.Activity.onMenuItemSelected(Activity.java:2174)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at com.android.internal.policy.impl.PhoneWindow$ContextMenuCallback.onMenuItemSelected(PhoneWindow.java:2731)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:139)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:855)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at com.android.internal.view.menu.MenuDialogHelper.onClick(MenuDialogHelper.java:129)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at com.android.internal.app.AlertController$AlertParams$3.onItemClick(AlertController.java:884)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at android.widget.AdapterView.performItemClick(AdapterView.java:284)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at android.widget.ListView.performItemClick(ListView.java:3285)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at android.widget.AbsListView$PerformClick.run(AbsListView.java:1640)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at android.os.Handler.handleCallback(Handler.java:587)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at android.os.Handler.dispatchMessage(Handler.java:92)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at android.os.Looper.loop(Looper.java:123)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at android.app.ActivityThread.main(ActivityThread.java:4363)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at java.lang.reflect.Method.invokeNative(Native Method)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at java.lang.reflect.Method.invoke(Method.java:521)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
08-27 05:36:56.241: ERROR/AndroidRuntime(333):     at dalvik.system.NativeStart.main(Native Method)


감사합니다.