One thing I've noticed on my computer is I have a normal CD/DVD drive and a CD-RW drive. The cds I burn with my CD-RW as data disks for backup purposes will not play in my CD/DVD drive. My computer will tell me there is no cd in the drive. So every time I reformat and install my back up disks, I have to use the CD-RW drive to back up personally made CDs.
If the CD you are using is not factory then I would be pretty sure this is why this is happening to you.
Watcher