First, you should make sure your SATA controller has the highest priority in the boot sequence and also that your drive is positionned as the FIRST Master. Then, since your installation when fine, make sure the SATA drive is the first in the boot order, you no longer need the CD drive to be first. Beside I always recommend that you use a hotkey to boot from the CD to launch the installation (like F11 for MSI motherboard, F8 for ASUS, F12 for Fujitsu Notebook, etc...) This way, you don't ever need to modify the BIOS setting to boot from the CD