Windows Server 2003

I somehow changed the boot sequence and now cannot get my system to boot to Windows. I have gone into CMOS and the CD/DVD drive is the primary boot and I’ve tried to change it to the hard drive. I can go into BIOS and change it but when I re-boot it is still looking for the CD which I can’t locate. How can I change the boot sequence in CMOS so it will boot from the hard drive? This is driving me crazy. Any suggestions would be great.