Calling dynamic swf thumbnail gallery to stage

I have 5 buttons with this script (swf name is changes):
on (release) {
_root.contents.loadMovie(“thumbnailgallery.swf”);
}

Each thumbnail gallery swf is comprised of a scrolling set of thumbnail photos in which you click on them it brings up a a bigger view of that photo. My problem lies in getting the scroller to work once it is on the main stage.

Any clues? It has got to be a parent/root issue but my AS is limited to basic stuff. Sure would appreciate some help.

Gaz