yep, i had the same problem with the 12 disc changer. Pop the magazine out, and make sure you slam it in good. Sucks that it is in your trunk, I could easily reach mine when I needed to. Also, you can ...

My roommate had a Sony 100-disc changer. I believe they make them up to 200 discs. It was pretty good. Once in a while, he'd run into problems where he'd have to take it apart and remove a stuck cd ..