Bought the 2MP 4 Camera NVR Readyview, picked up a fifth 2MP Readyview camera. Plugged it in, got the red light blinking on the camera so I know it’s getting a signal. Never displayed an image. I figured the camera might be faulty, returned it and got another. Same thing. So now I figure there must be some configuration/adding routine I’m missing. I went in to the manual add section, and I see the NVR shows the list of cameras, but gives me a message about maximum amount of cameras. It’s an 8 port unit with 4 cameras installed currently. Adding a fifth. Any ideas on how to proceed?