BeaconNotificationsManager many beacons

Hi everyone,

I need to user de BeaconNotificationsManager with many beacons,

MyApplication.java

public void enableBeaconNotifications() {
        if (beaconNotificationsEnabled) { return; }

        BeaconNotificationsManager beaconNotificationsManager = new BeaconNotificationsManager(this);
        BeaconNotificationsManager beaconNotificationsManager1 = new BeaconNotificationsManager(this);
        BeaconNotificationsManager beaconNotificationsManager2 = new BeaconNotificationsManager(this);
        beaconNotificationsManager.addNotification("80c66b4e5c439e272564bafd3664b103", "Hello, BEACON1.", "Goodbye, world.");
        beaconNotificationsManager1.addNotification("9b69133b0ccc35a14784f9a564d5cc05", "Hello, BEACON2.", "Goodbye, world.");
        beaconNotificationsManager2.addNotification("df6b6cb5be3d30438f683ad6638a2b18", "Hello, BEACON3.", "Goodbye, world.");
        beaconNotificationsManager.startMonitoring();
        beaconNotificationsManager1.startMonitoring();
        beaconNotificationsManager2.startMonitoring();

        beaconNotificationsEnabled = true;
    }

BeaconNotificationManager.java

public BeaconNotificationsManager(final Context context) {
        this.context = context;
        beaconManager = new BeaconManager(context);
        estimoteMonitoring = new EstimoteMonitoring();
        estimoteMonitoring.setEstimoteMonitoringListener(new EstimoteMonitoringListener() {
            @Override
            public void onEnteredRegion() {
                Log.d(TAG, "onEnteredRegion");
                String message = enterMessages;
                if (message != null) {
                    //llamamos al servicio para obtener las ofertas
                    URL_OFFER = URL_OFFER.replace(Constants.COD_BEACON, deviceIdBeacon);
                    URL_OFFER = URL_OFFER.replace(Constants.COD_PRODUCTO_FIDELIZACION, strTipoFidelizacion);
                    URL_OFFER = URL_OFFER.replace(Constants.COD_SEGMENTO_CLIENTE, strTipoSemento);
                    new GetOfferProduct().execute();
                }
            }

            @Override
            public void onExitedRegion() {
                Log.d(TAG, "onExitedRegion");
            }
        });

        beaconManager.setLocationListener(new BeaconManager.LocationListener() {
            @Override
            public void onLocationsFound(List<EstimoteLocation> locations) {
                for (EstimoteLocation location : locations) {
                    if (location.id.toHexString().equals(deviceIdBeacon)) {
                        estimoteMonitoring.startEstimoteMonitoring(new EstimoteMonitoringPacket(location.id.toHexString(), location.rssi, location.txPower, location.channel, location.timestamp));
                    }
                }
            }
        });
    }

I want to send every notification beacon for my customer in background, and this way doesn’t work, thanks a lot!