first, thanks for the replies,I completely erased the game.first I did " uninstall " and then use "regedit" I also deleted all file extensions with the name" 3dxchat " I installed the game again but same ... NOTHİNG CHANGE.... WTF???? maybe the problem is due to my video card.. My video card =Asus Prime RX550 4 GB GDDR5 128 BİT ...what do you say about this topic?