When I try to unlock my Droids screen it goes to an all black screen. the top bar that shows the time notifications and battery life is still visible. but all the buttons for my apps, and phone are gone? if I hold down the menu key it brings up the keyboard, I can adjust the volume but nothing else is working. I tried turning it off twice. If I hit the power/lock button and then turn it back on to the power screen it shows my background image and everything looks normal but as soon as I swipe to unlock it goes to the black screen