Ok...just to be sure...in your first post you said they were wma.
So, if your burned CD contains the real McCoy, the .cda tracks, then under normal circumstances they should play.
Next thing to check out is the media you are using. What brand of CD...and if possible where were they manufactured?
What software are you using to copy/burn the CDs?
What speed are you burning at?
Finally, what burner are you using?