Android registration for content watcher from service

I'm just trying to understand android services and content observer.

So, I tried a program in which my activity starts the service, and in the service I register in the CONTACTS URI to receive notifications when changes to db contacts change.

I rum my program, and I see that this service extends to applications → running services. Now I am trying to add a contact, and my observer is notified. If I edit the contact again, it will not receive a notification. Its only the first time after the launch of my program, if I edit the contacts, the content observer receives a notification. For details, see below.

The main activity to start the service:

public class ContactChangeOberverServiceActivity extends Activity {
    /** Called when the activity is first created. */
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Log.i("Start","Service");
        startService(new Intent(this, MyService.class));
    }
}

service:

public class MyService extends Service {

    private static final String TAG = "MyService";

    @Override
    public void onCreate() {
        Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
        Log.d(TAG, "onCreate");
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.d(TAG, "onStart");
        ContactObserverActivity observer = new ContactObserverActivity(new Handler());
        observer.register(getApplicationContext());
        return  super.onStartCommand(intent, flags, startId);
    }

    public boolean deliverSelfNotifications() {
        return true;
    }
}

And the observer:

@Override
public void onChange(boolean selfChange) {
    // TODO Auto-generated method stub
    // super.onChange(selfChange);
    Log.e(TAG, "Onchange Called");
    //MainActivity.takeContactBackup();
    Intent intent = new Intent (ctx,ContactsExtractorActivity.class);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    ctx.startActivity(intent);
}

/ TODO Auto-generated constructor stub
}

public void register(Context ctx) {
    Log.e(TAG, "Registering");
    this.ctx = ctx;
    curval = ctx.getContentResolver().query(
            ContactsContract.Contacts.CONTENT_URI, projection, null, null,
            null);
    curval.registerContentObserver(new ContactObserverActivity(
            new Handler()));
    Log.e(TAG, "Registered");
}

, . .