startDrag()

hello.

I am having issues with startDrag().
I have a movie clip called circle.
Inside circle, I have a movie clip called circleFill and another called circleOutline.

onEnterFrame, this movieClip is duplicated 4 times.


When I use this:
private function onPressNow(event:MouseEvent):void
{
startDrag();
}

IT DRAGS ALL 4 MOVIECLIPS.


When I use this:
private function onPressNow(event:MouseEvent):void
{
event.target.startDrag();
}

IT DRAGS circleFill and NOT outlineFill + circleFill.

MY QUESTION:

how can I make it drag my movieClip called circle? (meaning both circleFill and outlineFill)