Boot CD's are being ignored

[DummyTron]

Using an Intel DG33TL mobo. I can boot from:

OS Cd's (Fedora, Vista, XP, Server)

But I can not boot from Bootable CD's:

Hiren Boot CD, Dark Boot and Nuke,

Here is what I have tried:

1) Both of these CD's work in other computers
2) the Optical drive is functional as it can boot from CD's on other computers
3) BIOS is set to boot from Optical first
4) Changed my Mobo thinking it was the problem, problem still replicated in new mobo.

Why is this computer being selective on what it boots from ?

Thanks.

 

[joeten]

excuse me if iam being dumb but is that 3os on one disc maybe that is the problem the optical drive just might not like it try a single os on one disc