Gigabyte Motherboard Bios What Will Cause A Cd Rom IDE From Being Detected By Bios Win Xp Home Gigabyte Motherboard GA-M6 1PM-S2 Rev 2.0?

What will cause a cd rom IDE from being detected by bios win xp home gigabyte motherboard GA-M6 1PM-S2 rev 2.0? - gigabyte motherboard bios

I built a computer that works well for 2 days, then start could not recognize my CD-ROM?