I have my iPod Shuffle hook up to my company's phone system as the music on hold device. It is also plug in to the Apple AC power adapter at all times. It was working beautifully. Recently, it will work normally for about 30 minutes and it will just stop playing music. If I push the play button and it will start again. It almost seems like it went to sleep. Does anyone know why this is happening and how I can make it play continuously?