I was sitting in my server, and this guys joined. He started laughing, because whenever i try to walk with wasd it makes me look around, and when i try to look left and right with the mouse, it makes me strafe left and right. Please help me fix this. I've reinstalled CS:S and it still doesn't work. I just deleted the file, and then i'm reinstalling it again. I'll see if that works. Could someone please tell me how to fix this.