To boot from the CD you'll have to access the sms menu, try pressing 5 during the boot when you see keyboard on the screen, then make sure cd is selected as a boot option.
A full error message would help to see what the problem is.
Mike
"Whenever I dwell for any length of time on my own shortcomings, they gradually begin to seem mild, harmless, rather engaging little things, not at all like the staring defects in other people's characters."