I have a sony DW-G120A DVD burner that I'm trying to install in a Dell Dimension 4600C. It doesn't really fit in the case, but it's just for a couple of days, so the case can sit open as far as I'm conserned. The problem is that when I hook it up and start the computer, I get "strike f1 to retry boot, strike f2 for setup". It works fine when connected to the original DVD rom, but not with the burner. I've tried putting the jumper in all 3 positions on the burner. Any suggestions?