What is the make and model of your optical drive ? Also does the LED on the optical drive light up when you insert a disk into it. Also check in BIOS under storage configuration SATA Mode (AHCI Mode) is enabled. Connect optical drive to SATA port 5.
It is a Lite-on DVD Burner Model: iHAS124-04-OEM
It does not light up when I insert a disk because it does not open to allow for the insertion of a disk. Also, I just followed your advice and plugged it into SATA port 5 and set the storage configuration to AHCI Mode. Still nothing : / The bios says it does not detect any SATA device in port 5, although it is detecting my Seagate 1Tb Hdd in SATA port 1.