I cannot stream ArmA 3

Every time I start up ArmA 3 and try to steam it, the window doesn't show. Although it does stream through 'Screen 1' if I use that mirror, I cannot get the sound to work. I'm not sure what's going on or how to fix it, but any help would be much appreciated. Images provided are what I meant by "screen" or "mirror".And no, I've tested it, none of these are incorrectly displayed as ArmA 3, they do not work.