Can someone tell me why my iron maidens door doesn't open?

[LulleBulle]

The thing is Impulse don't need more power you just need to change the way the power is used, like if the doors are looking towards the x axis it's 7 on one of the impulse but if it looks the other way of the x axis it's -7 etc

Might be that it's pushing towards the wrong axis as you said but i really can't be bothered to change it, moving on to other stuff.