I am installing MCA-C5. When I have keypads and speakers connected I can access controller via USB only when CAT-5 disconnected. When CAT-5 is connected neither the USB nor the keypads can access the controller. I have set the IP address in the router firmware as well as the controller but still no communication. I have the controller connected through multiple switches to the router. All other devices work fine this way, just not the MCA-C5 controller. Should I just disconnect all keypads and set up network connection first, then connect keypads?