So I've tried all my 3mp cameras and they all work on both the 7716N-E4/16P and 7732N-E4/16P. However, when I plug in my 4mp 2042wd cams, it gives me an ip error message. I fix that and there is just a black screen. Any ideas how to fix this? Firmware on cam is 5.3 and on NVR is 3.3.4. When I hook the cams up to just my router I can view them just fine