I had the same issue, although I had the Notification checked within the App setting (using the menu button on top left of the App), Jelly Bean was still blocking it from the notification since I didn't have it checked there. Here is what you need to do. Exit the App, then go to the App info screen (where you are able to Force stop, Clear cache, or uninstall the app, etc..) once there make sure the "Show notification" is checked. That should solve the problem, it did for me.