What is the resolution of ur swf file? Is your swf resolution is 320x240 for e71 ? Stage.height returns the height of the swf file by default because Stage scaling is set to showAll (by default).May be this is the issue in ur case.So, just set ur Stage to noScale by this AS:
But remember, it is always good to make place holder (movie clip) for your flash component , so it can be used with any resolution (& can be placed anywhere) and can easily take the properties of movie clip by simple actionscript i.e
Stage.scale = "noScale";
. Hope it helps u.
my_placeholder.height = my_component_scrollbar.height;
my_placeholder._y = my_component_scrollbar._y;