Hello. My 3 cameras record fine and also are linked to my phone with the Hik-Connect app so I can live view them fine, but playback on the app does not work. It used to when I had just one camera, but even that was temperamental, now I added 2 more cameras none of them want to play back at all. When I select a camera to view playback, it just displays the little "play" triangle but doesn't do anything. All the other set ups I've done for other people work fine with exactly the same stuff, but mine wont. Playback works fine on the NVR at home obviously, just through the app its a problem. What am I doing wrong?? I can't get any response from Hikvision themselves and my supplier just cant help as he says contact HikVision so I'm stumped.