ide AND POWER CABLE REMOVED PC DOES NOT BOOT

[lostandfound+2]

Hi Guys(and Hello Forums),
I Have A Intel 915 Board With Just One Ide Cahannel.its Gives Connections To Both My Hdd And My Dvd Rw.now When I Remove The Ide And The Power Cable Of The Dvd Drive And Start The Pc It Dosent Boot(it Says To Set Boot Device Priority Or Insert Proper Bootable Media) .its Actually That My Hdd Dosent Get Detected. I Got This After Makin A Bootable Floppy And Entering C:\ It Says Invalid Drive Specification .
Please Help If U Can.
I Know I Am Doin Somethin Wrong.
Thanks For Readin.