What do you mean it doesn't recognize your hard drive...did it not install at all? Make sure the sata cable from the hdd is securely connected from both the hdd and the motherboard and make sure you have the power securely connected to the hdd.
When you go into the bios it should recognize all the sata devices (probably only cd/dvd drive and hdd) Does it see the cd drive?
See this is what is confusing me also. The cd drive works fine. they are both plugged in and sata cables to the mobo too. in the bios, this is where i get confused, the dvd drive is listed as IDE Channel 2 Master and the HDD is under IDE Channel 3 Master. I don't understand why they are under IDE when they are SATA. Is there something I can change in the bios to fix this?