PC will not boot from a cd, it keeps rebooting over and over

I have changed the boot order in the BIOS setup, And the computer begins to boot from the disk (linux live cd) but it stops booting and continually restarts.

I have checked the boot sequence and I have tested the live cd on other computers.

This is in a computer lab also. Is there a way that the admin configured the bios that prevents it from booting. There is not bios password.