I am unable to boot from the CD using either the Apple Restore Disk or Disk Warrior. I have tried holding the c keydown after pressing the power button and setting the CD as the startup disk (making sure that cap lock is not on). I have tried holding the Option key down after pressing the power button then clicking on the CD that appears on the screen. I have tried using the Apple restore CD and the reboot option when clicking on the CD icon and told to press continue to reboot from the CD. I can using the CD, access files etc. What could be wrong?