I remember a while back when I was heavy into that sereis of boards, you could not use EZ-flash beyond a certain bios file revision
if you "need" to flash your bios >>>>> read the manual for your board then use Afudos flashing method (the one with the floppy disk ) if you dont have a floppy drive, holler and I will give you the work around for that too
just holler if you get stuck