The load problems of the CD could be any number of things, but these four rise to the top of the list:
1) not setting the bios correctly to boot from CD - some bios'es are strange, even if you use the F-whatever key on startup and select CD, sometimes they will still try to boot from hard disk (I have one system that does this). You might have to change to boot order so that CD is first, or even possibly remove the hard disk from the boot order list (that system I have, I have to remove HDD from the boot list to get it boot from CD)
2) Bad or incorrect burn of the ISO file that renders the cd disc unbootable.
3) Corrupt download of iso
4) PEBKAC error.