State of War : Warmonger / 蓝色警戒 (Classic 2000)

State of War : Warmonger / 蓝色警戒 (Classic 2000)

Problem with cursor only in game
I have a problem and I don't know how to fix it:
my cursor is visible and works perfectly when I lunch the game and I'm on the menu of the game, but only when I started a mission it disappears!
My camera goes by itself at the right down corner and only the up and left arrow of the keyword work. Don't know if I should change something on the settings (I tried but nothing). Someone who could help please? T^T