i have a (2000) g4 powermac 2x450 gigabyte w/ 30g maxtor HD from apple. along with the dvd-rom and zip drive. i just got a western digital wd800 hard drive and am having problems installing it. my mac won't boot up with it connected. i have the jumper pin set to slave and have it connected to the gray (middle) ide ribbon cable and left the original on the black (last) after multiple configurations of the jumper pins i still can't get it to boot with the new drive hooked up. what am i missing!? HELP?