I had the same problem earlier today. I was literally trying to force the heatsink on and it wouldnt go on for some reason so i took it off to see what the problem was .... turned out I forgot to pull the bar up and then place the CPU in and then lock it in place. still a little tricky to get the heatsink on but I got it. Was using a Phenom II 965 be. i was forcing the **** out of it too and when i found out what i did wrong the panic set in lol