I am having a problem with my cd changer. i fill the magazine with 6 cds and when i try to play them only 2-3 out of the cds manage to play. Most of the time is just one cd. It show the disc number flashing then it does that for about 10 seconds then goes on to the next one. Then on some of the cd slots it says that there is no cd but there is. Can someone tell me what the problem is?