It sounds to me like two possible things can be the problem. One , is this an aftermarket faceplate? and two, what kind of home bar set of buttons do have on your psp. Alot of the times, aftermarket faceplates tend to have a thick coat of paint around the button holes causing the buttons to really stick. A similar scenario applies to aftermarket button sets. In this case, gently scrape off a bit of the paint from the faceplate, enlarging the hole diameters. Good Luck....