Have you look in here if it is there make it the first one.
BIOS Features
Hard Drive/CD/DVD ROM Drive/Floppy Drive/Network Device BBS Priorities:
Specifies the boot order for a specific device type, such as hard drives, optical drives, floppy disk drives, and devices that support Boot from LAN function, etc. Press <Enter> on this item to enter the submenu that presents the devices of the same type that are connected. This item is present only if at least one device for this type is installed.