BMW Won't Play Burned CDs

I have a 2003 BMW 525i. I burned a few audio CDs with iTunes, so I could listen to them in the car. When I inserted them, either nothing would play, or a continuous noise would come from the speakers.

Should I set it to a lower running speed? Does it not play audio CDs? Or is it iTunes, do I need to use different software to burn it? I'm having a tough time figuring this out, and I need an answer!!!

I know this may be a problem with the car, so I should go to a BMW forum or go to the dealer and figure out what's up. If its a software issue, however, I figured I should check the Support Communities first.

Thanks in advanced!!!