Can not get rid of xml loaded image scroller when navigate out of the page.

I have an xml loaded thumb scroller which stays on the screen when I exit the frames where it exists.

Here is the set up which I have tried to fix this issue. It was suggested that I put an mc on the frames with the image scroller and call it dummy_mc.

Then I put the code on the frames which are not supposed to have thumb scroller:

dummy_mc.visible = false;

function removeScrollerF2(e:Event=null):void{

if(scroller){//prevents a problem if you were to use the same navigation code after the scroller is removed

scroller.removeEventListener(Event.ENTER_FRAME, moveScrollerThumbs);

removeChild(scroller);

scroller=null;  // if, when you want to re-create your scroller, it fails to be re-created, remove this line of code.

}

    trace("dummy2_mc works on null");

}

dummy_mc.addEventListener(Event.REMOVED_FROM_STAGE,removeScrollerF2);

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I have this argument error in the output panel:

ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.

    at flash.display::DisplayObjectContainer/removeChild()

    at acolyte51c_AppsPopUpsThumbs_fla::mainsite_mc_2/removeScrollerF2()[aco lyte51c_AppsPopUpsThumbs_fla.mainsite_mc_2::frame73:399]

    at flash.display::MovieClip/gotoAndPlay()

    at acolyte51c_AppsPopUpsThumbs_fla::mainsite_mc_2/gotoFrame2()[acolyte51 c_AppsPopUpsThumbs_fla.mainsite_mc_2::frame73:372]

This is the frame73:399
removeChild(scroller);