I know it's been a while since anyone has posted in here, but since the thread is stickyed, I'd figure I'd let y'all know whats going on (at least for my 08). Heres the problem, most audio files we listen to are actually compressed, and our computers activley decompress the file as the music plays. Therefore, the issue is that our head units don't know how to decompress these files. The trick is, burn your CD's in a manner that will decompress the audio file before burning it to a disk (I use Roxio and burn them as "Juke Box CD's"). So, I'd say give this a go, it's worked for me every time so far.