Cut long story short added my old cameras to new system all cameras work.however when i connect all old ones cam1 cam2 cam3 they al show but when I put cam 4 on cam 3 goes out .When cam4 is not used in top left corner it shows 960h on all three but when cam 4 is used cam 1. And cam2 say 960h but cam 3 and 4 say 720p is there anyway I can change cam 3 to a 960h if this makes any sense oh and it's a floureon dvr thanks