Ok, I desperately need help

.
I downloaded the 27.1 version, burned TDK, Verbatims and what not.. at 1x, 4x, 20x... the result is the same. My MKIV dvd unit will doesn't do anything.
I pop the CD in and I watch the unit, I hear spinning it then quiet. The screen doesn't do anything, still says to insert a CD/DVD.
Any ideas? Am I doing anything wrong?
Thanks!