Service binden - onBind() wird nicht aufgerufen

        Intent intent = new Intent(this, ConnectionService.class);
        mConnection = createServiceConnection();
        
        if(!mBound){
            Log.i(LoginActivity.class.getName(), "Binde Service");
            bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
        }
        Log.i(LoginActivity.class.getName(), "mService is " + mService);

        ServiceConnection mConnection =
                new ServiceConnection(){

            public void onServiceConnected(ComponentName className, IBinder service) {
                Log.i(LoginActivity.class.getName(), "Service connected");
                LocalBinder<ConnectionService> binder = (LocalBinder<ConnectionService>) service;
                mService = binder.getService();
                mBound = true;
            }

            public void onServiceDisconnected(ComponentName className) {
                Log.i(LoginActivity.class.getName(), "Service disconnected");
                mBound = false;
                
            }
            
        };
        return mConnection;

public IBinder onBind(Intent arg0) {
        Log.i(ConnectionService.class.getName(), "Erzeuge Binder");
        return new LocalBinder<ConnectionService>(this);
    }