Help! Cd Changer Won't Hold Cartridge

[ezekielj007]

I have a Nav with ML sound and the cd changer in the center arm rest. The CD changer will not lock the cartridge in to stay. The only way I can get it to play a disc is to hold the cartridge in place while it shuffles through the CDs then starts to play disc 1. If I try to shuffle to the next disc the cartridge slip out of the changer partially and won't play the disc. Any one know if this is an easy fix. Obviously something not locking on to the cartridge.....or could it be the cartridge itself?