In the Blender Game Engine, I used servo control to move a cube along the x axis when "W" was pressed. That worked fine, but when I used the exact same settings (except for direction, of course) to make it move on the negative x axis when "S" was pressed, it wouldn't move. I even tried changing the direction to the positive x, and that worked fine. But when I switched it back, it didn't work again. And I don't think that it is because of directional friction, because this same thing happens when it is on a different platform, or even in midair. Also, it works fine when I don't give it an x limit, but even if I give it a limit of 10000 it wont budge. And I really need that limit on it. Does anybody know why this is happening? Thanks!