a couple things:
don't use cd rws....just use cdr's...
try some different brands...some brands work better than others
burn at a slower speed...
burn them in wav format...tell me what program you are using to burn, and I can help you out on it...after you burn it, put it back in your computer, click on my computer, go to the drive where the disk is, and single click any of the songs (or right click and go to properties), if the file size is like 30k, it is in wav format (yes, wav if 30k, because the computer will only read the icon size, I realize wav files are like 50 megs!), or if it is like 3 or 4 megs, it is in mp3 format...which will not play unless you have an mp3 player in your car...
another way to tell is how many songs you can fit on a disk...if it is under 20, they are in wav format, if it is a lot more...they are mp3 format...
songs from online sites will work...if they are in wav format...just listen to the WHOLE song first...lots of them have messed up music towards the end so it sounds like garbage on your radio, etc...
if the songs are in wav format and it is not working, try one of the first suggestions...then it WILL work...
email me with any q's...
eric