How do I boot Windows XP from the CD

The default CD is already chosen and it shows it connected but when i restart Parallels the CD wont boot. Any ideas. I'm trying to repair Windows XP but i cannot access the CD.

 

To answere my own question: Remember to click the parallels desktop CD/DVD-ROM 1 option when the windows XP Application has stopped. Once you see the configuration window then choose the option that says "default CD/DVD-ROM in the CD/DVD-ROM options. There are other options that can be used that will render it impossible to boot from the windows CD later on if you need to rescue windows XP from a problem.