Question: Why do you still use it? I mean directx9 is now reealy old. I gave up on acknex and I am using godot engine now. Not bloated like unity ue lumberjack and much more agreeable licensing conditions (it's free).
It is realy questionable to release a game into the marked with such an old engine. It generates al lot of problems on newer machines. For example, I am getting only 30fps on my new desktop PC in fullscreen dispite any settings I tried (this problem only occures with acknex). At that moment I thought .... no, it is enough, even if there is a solution.