Can't boot from Cdrom

i have a asus p4c800 and i cant boot from cdrom or zip{emulated floppy} ive
done all the settings in bios but when it posts it just goes to this smily
face and a blinking cursur, it doesnt even try to read the discs.
i lost my floppy drive access so i finally was able to copy my ghost boot
disc to zip and have zip emulate floppy but i still cannt get it to
work....all i want to do is ghost my drive without having to spend more
money on the latest ghost...i have ghost 2002.
any serious help appreciated.

thanks
dave