No Response

[pc11000]

I try to get a Respons from the APNS but the Respons is always = null..

try{
if ( !isConnected){
initializeConnection();
}
List deviceList = Devices.asDevices(receivers);
for (Device device: deviceList){
try{
//validate Token
BasicDevice.validateTokenFormat(device.getToken());
PushedNotification notification = pushManager.sendNotification(device, payload, false);
if(notification.getResponse()!=null){
notification.getResponse().getMessage();
}
notifications.add(notification);
}catch(InvalidDeviceTokenFormatException e){
notifications.add(new PushedNotification(device, payload, e));
}
}
}catch(CommunicationException e){
stopConnection();
throw e;
}
}

I tried it with an invalid token but it doesnt work