Sata DVD burner

Question

Hi. I want to use a sata DVD Burner while using a IDE hard drive. when I connect the DVd drive and start the computer I get a message say [Boot disk failure] insert system disk andpress enter. my Gigabyte motherboard GA-8EANXP-D has four silicom 3114 connectors.& 4 SB sata connectors I have gone into the device manager and the Sata Image Sil3114 controller is there and working fine, I went into the cmos setup Utility and have these settings. Onchip primaryPCI/IDE enabled. Sata raid/AHCI mode [Raid] shut down and restarted same problem, went back in again and set onchip sata mode [ Auto] would not start up. went into the raid configuration Utility. in the Phyical and logical drive it shows the HL-DT-ST-DVD Ram GH-20 CD-Rom. I hope you ca assist me with this problem. Many Thanks. Terry.