Okay I know this shouldn't be hard but I am having difficulty installing new RAM in a PowerBook G4. I insert the RAM at an angle then push down but it does not just "click" into place. I would have to press really firmly for that and the manual says to not press hard. I have removed and reinserted the memory about 10 times and cannot get it. What am I doing wrong? How hard are you supposed to press to get the RAM to snap into place under the clips? Am I supposed to move the clips myself or just press down?