hi today i have installed an amp/sub in the boot which went as smooth as possible really, however there is one problem. as soon as i plug in the rca cables to the back of the cd player the factory speakers all cut out. could this be a problem with the wiring or is it more likely to be a setting in the cd player? i dont have the manual anymore but the model is ministry of sound mosca034. its about 3 years old now. thanks for your help