Switcher for Car Audio Display
 

I currently have a Incontrol Systems Car Audio Switching Display but am having issues with it. When I plug it in, All circuit boards are powering on but can not get the switches to switch from one component to the other. I am also looking at the possibility of buying another switching setup. Wondering what might be the best solution. My current display consist of 12 headunits and 16 speakers. No subs No Amps on the display