Raid causing serial ata problems

Have a SATA blu-ray/DVD drive. When I have the RAID mode for the onboard ATA device set to RAID mode (in BIOS), neither Windows installation NOR the MSI BIOS can see my blu-ray/DVD drive. If I change the RAID mode to IDE in BIOS, then both BIOS and Windows can see my blu-ray/DVD drive just fine. So, how can I configure my SATA hard drives for RAID, AND still be able to use my SATA blu-ray/DVD drive, because as soon as I enable RAID mode it disappears, and when I put it in IDE mode I can't utilize RAID?

this is a new install for windows vista (64bit) so there is no OS installed yet...so when I try to install it via raid it says it can't find cd/DVD-rom drivers. Updated bios to newest version as of 10/16/09, and still have same problem.

Running msi 709gx-g65, (bios version 140) AMD phenom II x3, 8 gigs kingston ram, 2 -500 gig western digital hardrives

Thanks Thomas