Clip stops playing

I play music, it plays a couple of songs and stops playing. I press the center button and it starts again. Is there some kind of ‘sleep’ function or is this a problem?

Um, did you check your Settings/Power/Sleep setting?  Or other settings?

You also may want to read the product manual if you haven’t (see the Clip Specifications sticky thread at the top of the forum for a link to the manual).