I have a 512 mb gecube ati hd 4850 graphic card. I cannot update its bios. I use my usb flash disk. I installed hp usb disk storage and created system start up disk as flash disk. I installed atiflash in flash disk and also new bios bin file. when I boot my pc from flash disk and write "atiflash -i" command it says no ati vga adapter found. If I try to back up my current bios it says "ati 0 not found" or sth like that. Can anyone please help???