MHDD won't boot

[iS Apache]

I downloaded the iso image file and burned it to a cd-rw with Burn at once(free iso burning software).I then popped it into my computer and it wouldn't load up i even burnt a fresh copy,and tried an older version of it but it still won't load...does anyone have any suggestions?
I even tried using different cd-drives in my computer...

[rchadwick]

Have you configured your BIOS to boot to a CD/DVD drive?

[iS Apache]

yes i have i've had it configured for about a year now...i got it working it turned out to be jumper settings on the hdd...