samsung ue40hu6900 problem with A-TV

Hy Folks, i got a problem with video and audio when connecting Apple-TV to a Samsung UE40HU6900

So i read many posts about apple tv and samsung and all of them said:

1. rename HDMI-2 to PC

2. go in Service-Menu of Samsung and deactivate HDMI-hotplug

so i did both of them but it didn't help.

if i'm looking a film on my Macbook pro (2015, i5, 8bg) and i want to Airplay all i got is 1 image all 3 sec's and almost no audio (stuttering)

If there are no better settings or other options my conclusion would be that apple tv is completely useless...

Sry folks but i got better results with the Parrot App on a 2010 Macbook Pro and the same tv...

SO question:

What can i try or change on TV (UE40HU6900) settings or Apple-tv to get this working, i just wane watch films over Airplay (which is what's it for)