Probably a simple question

I am fairly new with action script and I am trying to build an interactive map where the user clicks on a country and then the country pops up along with information about the country. I have that part working fine, but when the country does pop up it is still behind the map, even though it is above it on my layers. I was told that the best way to fix this would be by using setChildIndex, but I am not really sure what that means. I tried searching and got a bit of code which I added to my action script layer, but what else do I need to do? Do I have to to anything special to the actual layer with the movie clip that is activated on click? I am not getting any errors but the movie clip still is behind everything. Any help would be GREATLY appreciated. Thanks!

This is the code I have right now:

stop();
import flash.events.MouseEvent;

//—Italy pop up on CLICK—\
italy_btn.addEventListener(MouseEvent.CLICK, iClick);

function iClick(event:MouseEvent):void {
gotoAndStop(“italy”);
event.target.parent.setChildIndex(event.target,1);

//—Back Button—\
addEventListener(Event.ENTER_FRAME,chkAvailable);
}

function chkAvailable(e:Event):void {
if (back_btn) {
back_btn.addEventListener(MouseEvent.CLICK, rClick);
removeEventListener(Event.ENTER_FRAME,chkAvailable);
}
}

function rClick(event:MouseEvent):void {
gotoAndStop(1);
event.currentTarget.removeEventListener(MouseEvent.CLICK, rClick);
}