Not Recognizing IDE Hard Drive!

[EnchantedPlague]

I successfully installed leopard with the iATKOS v5i disk on my EVGA nForce 680i on an old IDE hard Drive. However, that hard drive was old and dying, so i bought a new one (Seagate Barracuda ST3160815A). I go to install leopard again, the same way I did before. The problem is this time, when I use disk utility (on boot disk) my new hard drive does not show up! It is recognized in windows and I can format it. It is also regognized in the bios. I booted up the leopard disk again and this time it recognzed the hard drive. So i installed leopard and reset my computer. When i try boot from the hard drive it acts as if there is nothing on this disk, and wont even try to boot anything (no errors, just doesnt boot). I boot back on the leopard disk, and again, the hard drive doesnt show up! What is happening here? How can i get it to work! I tried connecting it through USB and it will recognize it. But I dont want to boot from an external USB Drive. I have tried many different versions of leopard, and it still wont recognize it.