In the bios try setting every harddrive option to auto and not user defined.
Is the jumper on the hd set to master and not slave.
Is your ata cable that is connected to your hd connected on your motherboard on ata1 and not 2
Another question are you using one ata cable for both the dvd-rom and the hd?
Sorry for all the questions.
If I dont respond immediatly try my e-mail it is always on even if I am off the net.
Here it is
famjs@puknet.puk.ac.za