I work for Coby technical support. Our customer
number is 1-800-727-3592.
Your music may be in the wrong format or it may have DRM protection which is a license created by the recording industry. If you call our tech support number above, we can walk you through discovering why the music won't play.
Coby players can recognize .mp3 and .wma audio formats. If you're pulling the music from iTunes, it's in the wrong format and will not play on a Coby without being converted.
If you feel this solution doesn't deserve a good rating, please let me know why so that I may better assist you. If there is anything more I can do to help, I will!