So you're not seeing any error during the burning process? Which program have you been using to burn your CDs?
First off - are you burning Audio CDs or mp3 CDs? Don't burn an mp3 CD. You might have all mp3 files to put on the CD, but that doesn't mean that you need to burn an mp3 CD... mp3 CDs are a bit different to normal audio CDs... an mp3 CD burns the songs in compressed format. Lots of players (specially older ones) can't play mp3 CDs. Try burning again & when you're asked to choose the type of CD that you want to burn, choose Audio CD
What kind of discs are you burning to? If you're using CD-RW (re-writable discs that you can use over & over again), lots of players won't play those either. Try burning to a CD-R disc instead & burn at a slow speed - not the maximum speed. You should see an option somewhere to choose your burn speed.
The link below has info about how to transfer files to WMP & info about burning with WMP
http://www.gnutellaforums.com/tips-t...rning-cds.html