@ Headpop where can i find the parameters please?
@ ozzbik where do you exactly mean?
---------- Post added at 16:17 ---------- Previous post was at 14:56 ----------
OK i solved the problem. To be nice i tell you what happened.
I think my problem has been different from most people. As i quitted playing Arma 3 i deinstalled sweetFX what i had installed to upgrade my vision. As i deinstalled it i didnt remove the files from sweetFX that i earlier had to put in to my Arma 3 folders. I removed the files
d3d9.dll
d3d9.fx
dxgi.dll
dxgi.fx
injector.ini
SweetFX readme.txt
SweetFX_preset.txt
SweetFX_settings.txt
and now it works finally.
Thanks to you Headpop for the hint with the log file. And thanks to anyone else for helping. Its always worth to look into that log files.