[CentOS] 64-bit ISO Burning Failures

Hi,

I have downloaded several different sets of the 64-bit ISOs, and have
burned them to CD using various of my known-good ISO burning softwares,
including Nero and DeepBurn on Windows, as well as the native CD burning
KDE linux tool on Xandros Linux.  I am using mirrors from the site, like
kernel.org.

I have chosen low burning speeds also, but when I insert the ISO CD into a
server and boot it up, the ISO doesn't work.  I have all of the BIOs/boot
settings perfect, the machine is definitely 64-bit, and even when I insert
another OS, like Fedora, or Whitebox, it works fine.

Is there something i'm not doing, or doing wrong when burning these 64 bit
CD's?  I'm in a colo facility and would really like to leave here having
converted a bunch of my WBEL and FC boxes to 64-bit Centos.

Any help would be much appreciated.

-karlski