CD player help

[Viper5]

I have a CDR 220 and lately my cd that is playing will cut off completely when I hit a bump or accelerate hard. This is not beyond any limits that have been crossed before but now it's happening for all of my cd's and for the past couple months. I can only think that I changed a setting similar to how cd walkmans have that ESP protection for a certain time. Can anyone shed some light on why this may be happening. It is kinda old (2k) but I am convinced that it's something simple that I changed inadvertently. Bear in mind that it works completely fine when I am at a stop and this just started happening recently. I know that if I do something crazy then of course the cd player will not be able to read because of the vibration, but it's not nearly that intense when I'm driving. Have owned the car for a couple years so I know what should/shouldn't be working. Thanks.