I installed the latest firmware 5.6.15 on both of my cameras and when I login to either of them in ie11 the PTZ console is not there. The PTZ header is there but all of the other buttons, up, down, left, right are not the area is just blank even the presets do not show. I thought it may be the browser so I tried a different one and that was the same also in that browser live view failed. I have reverted back to 5.6.11 and all is back to normal. Can anyone please shed any light on this issue, thanks in advance.