my cd player is acting up. i have a kenwood cd player, specifically a KDC-MP628, and the Cd won't come out right. when i hit the eject botton, it comes out partially, then just goes back in, or gets stuck right there and i have to pull it out. i was wondering if there was a way to fix it, if there is anything i can check for it. it did it once before maybe a couple or few weeks ago, but came out more than half way, then just happened worse again this morning and only came out less than half way...