For what it's worth...
When I had problems, it was because of several things...
First time, I burned the CD as a 'Music' disk - limited the number of tracks to about 25...
Next, I found that my unit would only play CD-RW correctly (including for the software updates that used to come out regularly)
Last - don't use folders and simply copy and paste the MP3's from the computer to the CD-RW set up as a data disk. Can get upwards of 250 tracks, depending on the bit rate used.
JMHO
-bogie