Two possibilities I can think of. MAke sure that the side button on your ipad is set to screen lock & not mute. If it is set to mute, you'll need to slide it to unmute it before the speaker will work. Otherwise, it sounds like some kind of software glitch. I'd do a reset (I think you hold down the power button & the button on the top for like 10 seconds, until you get the screen asking if you want to turn your ipad off. Follow through, give it a few seconds, then restart it.