Go into your BIOS settings and make sure your SATA controller has not been set to RAID. You're going to want your SATA controller set to AHCI or ATA to assure it can recognize a single drive. Even then, you may have some problems, when your motherboard was designed most DVD drives were connected via a standard ATA connector. However, if your BIOS supports this type of drive, then this should help.
BTW - Don't forget to change the boot device (when installing the OS).