I've downloaded the lastest knoppix version and burned it onto a DVD, it was just a little over 700MB (2 big for a CD). I can't seem to get my system to boot up with it. I tapped F12 when loading up and selected boot from USB / CD. The dvd wasn't recognised.

Can anyone see what I'm doing wrong? Probobly something simple like not burning the dvd correctly or I don't know the right way to boot it up.

thanks,
Andy