I opened the PS3 many times to test if there any pressure on IHS so I put two pieces of cards on the clamps and I screwd titely. I went to webman to mount some games but it gave me an error! Here I began to suspect that the error is coming from the pressure so I opened it again to remove the cards that I put and when I want to screw the clamps it doesn’t reach the heatsink! Only one screw that doesn't reach to heatsink!! Please can anyone help me?