Parent -Child - GrandChild - positioning

programming flash
1

Hi Guys,

I have three swf, which I load into one another,with the relation parent, child and grandChild. I want, from the child be able to load the grandChild and tell it to always position the grandchild 50px from the top in relation to the parent.
(I have created resize handler which works for the child)

I tried:

grandchild.x= stage.stageHeight-stage.stageHeight-50px;
grandchild.x= parent.stage.stageHeight-stage.stageHeight-50px;

But none of them seam to work.

Many thanx