RemoteNotifier events not firing after invoking subscribe method

I am creating an iOS application.  I need to use APNS.  The application is set up at Apple and is working, but I am unable to test Push Notifications because I am unable to get a device token.  From my understanding issuing RemoteNotifier.subscribe should cause RemoteNotificationEvent.TOKEN to fire.  This never happens.  The code is below.  None of the RemoteNotifier events fires.

var preferredNotificationStyles:Vector.<String> = new Vector.<String>;

preferredNotificationStyles.push(NotificationStyle.ALERT);

preferredNotificationStyles.push(NotificationStyle.SOUND);

preferredNotificationStyles.push(NotificationStyle.BADGE);

var subscribeOptions:RemoteNotifierSubscribeOptions = new RemoteNotifierSubscribeOptions();

subscribeOptions.notificationStyles = preferredNotificationStyles;

var rn:RemoteNotifier = new RemoteNotifier();

rn.addEventListener(RemoteNotificationEvent.TOKEN, sendDeviceTokenToServer);

rn.addEventListener(RemoteNotificationEvent.NOTIFICATION, notificationReceivedByApp);

rn.addEventListener(StatusEvent.STATUS, subscriptionFailureCallback);

rn.subscribe(subscribeOptions);