If the CD does not spinup (it makes no sound and the light does not come on), then your system does not try to boot from CD.
In this case, you will have to tell the computer how to boot from CD. This varies from computer to computer but your computer's initial boot screen should contain a message that tells you how to do this.
Forcing Boot from CD
To force your system to boot from CD, you may be required to press a special key, like F1 or F12 and then you will be presented with a list of boot options. Or you may be expected to press the right or left arrow key to select from icons that represent the options. Or you may have to press F1 or F2 or Del to enter your BIOS setup to change your boot options to enable an automatic boot from CD.
In some rare instances, you may be unable to tell the computer how to boot the CD. In this case, the system will ignore the CD or it will freeze before the Boot Screen appears.
If you have a computer with a floppy drive, read "Boot Floppies."