I've downloaded an MP3 file that will not play in my DVD player although it's supposed to play MP3's. It also will not play in my 3 year olf car but will in a new car. I looked at the CD's properties and it is an MP3. I'm using Vista media player to burn the disc. Any suggestions as to why the CD will not play in all the players?

Could be this reason, see WARNING: Viruses on network you should be aware of! (click on blue link) no. 2. (o)