can't get knoppix cd to run
I have downloaded the latest knoppix iso. I have burned it to a cd using nero.
I have my xp set to boot from cd, yet when I turn the computer on with the cd already in I can here it spin yet it doesn't start up; my computer just goes to where it asks if I want to start in normal mode or safe mode.
So I unloaded the iso into a seperate folder, then burned all the files to cd.
This time I here the cd spin but the computer boots straight to windows.
Does anyone know what might cause my knoppix cd not to run?
Thank for any imput.