Unable to install Ubuntu on a Revo

Hi all,

I have a Revo and I'm trying to get Ubuntu on to it, but I'm failing.

I've changed the boot order in the BIOS so that my external CD/DVD drive is first, but when I boot the Revo, it is ignored. I have also pressed F12 for the boot menu, and it is not listed in the menu.

The CD containing Ubuntu *.iso has been tested in other machines and works fine. I also have a Lubuntu *.iso which works fine in other machines, but not on the Revo.

Any suggestions as to how I get the install going would be appricated.

Thanks.