hey i just got my ppc6600 and everything works except for my green call button my red end button my up/down/left/right and the center (ok) button, and my four little shortcut buttons. is there some kind of button lock on my phone that would cause the lower half of my phone to be dead? the power button on top works and so do the buttons on the side of the phone (camera and message) also the the volume control works too? can anyone help me?