Which CD-RW r u using?

[Mr. 4500 RPM]

i always use cd-r's for my car...but yeah it could be that your head unit does not accept mp3 files as previously stated and you need to convert to wave files. when making cds i usually use a program called mp3 decode and convert to wave and then use easy cd creater to make the cds...nero i hear is hella good though best program for it according to tech tv so yeah id say go with nero. i use easy cd creater because it came with my comp.