Malphas (DayZ)

No night time, it looks always like this. No matter what time it is. And even if it is night. It can't look dark like this.

Good evening, I wonder if any of you had the same problem as me with the game/mod or whatever the problem is. If I play Arma 2 (the normal storyline) the graphics looks fine. But If I start DayZ it all looks a little like this: I changed every setting that is changeable, from very high to very low. But it always look like this, always. Is this issue known? Can somebody help me with this?