Win7 OEM disk will not boot

I have tried to boot my OEM Win7 disk but it is not recognized.

This is a rebuild of a machine, new Anthlon X2, new Biostar MB, 2Gb RAM, new WD 500 STAT HD, new 430W PSU.

I tried several times to get the OEM Win7 disk to boot but nothing. To test what was wrong I inserted my XP home disk and that booted fine? I went ahead and did a base install of XP and it worked fine.

I installed my previous IDE HD and moved data to and external HD, but now I want to do a clean install of Win7 to the SATA HD and remove the IDE HD, but the OEM disk doesn't boot. From inside Windows Explorer if I view the D: (DVD) I see it has a disk but when I explore the disk it show no files? Is this normal? Is it an image that will not show the files?

Any help would be appreciated

No, machine is an old XP machine that I rebuilt with new components. Purchased the Microsoft OEM Win 7 Premium based on recommendation from store, this is an official Microsoft disc not a third party.

Both my OS discs are official Microsoft, the XP fires up but not the Win7.

No the drive is a DVD drive, burned several DVD's myself. As for trying in a different computer I'm short on another Windows box, I've got a MacBookPro but that won't help me. I might be able to see if my neighbor would let me put it into a machine and at least see if it reads it?????

Mitchell65 - I don't see anything, when I open the D: drive I just see a blank folder with no files???? That is what puzzles me as well, figured I should see a setup.exe and other stuff at a minimum.

I have a IDE HD with XP installed that I plugged in. It was the C: drive and then looked at the disk in the DVD. This is a "clean" install scenario to the new SATA drive that is installed. Once this is working I will pull data from the IDE drive and it will go away.