Have you tried the F5 command to reset the bios back to default? Sometimes this can happen if the HDD controller is not set to auto detect your drive. Most, if not all new mobo bios are by default set to auto detect. While in setup or bios hit the F5 key on your keyboard it will ask you to say yes hit y and the system will restart. Then go back in to check if the correct model is listed in IDE settings. If it isnt let me know and Ill tell you how to manually select auto detect. I will need to know what model of bios you have in order to do this because not all bios have settings in the same place.
Hope this helps you