1st boot/dvd/cd
2nd boot HD
3rd boot disable ( this would be the floppy, but because you aren't using one you don't want it looking for it )
if you have any other drives other than the main boot drive hooked up, physically disconnect it.
also, in the BIOS where the time and date stamp are....... don't tell me you don't see that.............. below that somewhere is 144 drive or floppy or something like that. disable it.
F10/enter to save. let reboot. should see dvd drive and soon give option to boot from cd.
try hooking SATA cable to different spot on board.
what HD do you have ? what's the rest of your hardware ?