If the center plastic springy thingy is broken, find yourself a ring magnet and put it on top of the center of the CD when you play it. Works for me.
Also, mine has gotten where it won't play certain CD's now, which I'm betting is pesky "C2103". I got the replacement kit from Martin, but haven't had the time to do it yet. Depending on what your problem is, you might look into that as well.
Hope that helps.
Jon