I made a few recordings to my CD player, that will not play on my car CD player saying there are not audio files on the CD even though they are there. Other purchased music CD's in the car play perfectly. The files on the disk, are in .WAV format. They will play on my laptop internal drive, my laptop external drive and on my home stereo system but not the car even though the player in my car will play any other CD in put in there. What gives ?