Tweening and Collision zone problem

For one of the enemies in my game, he requires to be bigger than the usual size of enemies. I've tried just drawing him bigger but when I try to place him in the scene nothing happens. Then I tried tweening/resizing him which worked perfectly, but then the collision zone doesn't work correctly, it is too small to fit the actor and when I try to edit the collision zone, it doesn't let me move the zone, just resize it. Any ideas?

    I'm not sure if this is one of the problems but you know that you can't drag the zone with your mouse, right? That's what X and Y positions are for when making the zone. And when you say you tried to put him in the scene, what do you mean by "Nothing happens"?

I finally fixed the problem, turns out the invisible part of the animation was too big for the scene... Major failure on my part :l