DDVD-ROM Drive not appearing in BIOS or Boot menu

I recently set up an old machine I built in 2003 as a test machine and as a result needed to replace some components that stopped working, including the CD-ROM Drive.

The drive is fully functional and is visible in My Computer to use however it does not appear in the BIOS and I am unable to set it as a boot option.

The motherboard I'm using is the one i originally installed back in 2003 which is an ASUS P4V8X-X Motherboard which has two SATA points. The drive I have installed is a Samsung SH-S223C 22X SATA Dual layer DVD Writer DVD±RW

The hard drive is an 80GB IDE connection, while it also has the 3 1/2 inche floppy drive also attached. I have tried changing the boot priority and also tried selecting CD-ROM in all BIOS connection options whilst trying to research this, but as of yet have not been able to find an exact match or solution to this problem, I have also checked and it appears the BIOS is up to date.

I did also briefly think it may have something to do with the SATA cable but believe this not to be the case since the device is fully functional and visable in my computer.

I'm hoping it doesnt just come down to an issue due to the age of the motherboard. If anyone can offer any thoughts or suggestions it would be appreciated.