There are many, many factors that can cause a CD to play in some players but not in others -- and I've been nailed by all of them at one time or another!
One obvious cause could be the brand of the CD that's having problems -- but it could also be the speed at which the CD was recorded, whether some dust has accumulated in the drive, etc.
I have learned to burn audio CDs at low speed (personally, I burn audio CDs at 8x -- never faster). I have some CD-Rs that I burned at the maximum rated speed that won't play back reliably -- sometimes they do, sometimes they don't, even on the same player or computer. I have had much better and more consistent results at the low speed.
There are some players that have problems with specific CDs. About half of my players won't play back CDs that I burned using the "original" Verbatim Digital Vinyl brand, with metalized Azo dye (the recording side looks blue). And I have heard
(but can't personally verify) that blank CD-Rs have a shelf life of a few years -- wait too long to burn them and the results will be inconsistent. Again, I have heard that from people I trust, but haven't encountered it myself.
Have you tried using anything other than WMP to play back the CDs? I don't like WMP, and haven't used it in years. There are several excellent free players available. It is possible
that the problem lies with WMP, since the CDs seem to play well everywhere else.
Edited by Capn Easy, 09 March 2009 - 02:15 AM.