IC7-G HD does not detect when overclocking

Ok, i dont know what's up! Here i have this very capable motherboard, but whenever i raise the FSB by even a little (203mhz) the hard drive will not detect, and thus i cannot boot. Everything works fine at 200mhz and then i will change the fsb and it doesnt detect. It is a 120G Seagate SATA Barracuda. Does anyone have any suggesstions?

edit: and i also have the most recent bios (1.7)