Once randomly, I held down the top button to shutdown my ipod but it would not work. I got this touch today, and it worked before. I cannot turn it it or shutit down with that top button, instead I need to wait for it to auto lock after 1 minute, and turnit on with the home bottom button. Then a few hours later I picked it up and it started to work again, not it doesnt. What is wrong with it? I have a case on my touch, and it was cold when I picked it up. Any ideas?