foot with swipe don't work

[zszen]

with hand it is allright . but can't with foot

the exp:

var leftFootHorizontalSwipe : HorizontalSwipe = new HorizontalSwipe(GesturePart.LEFT_FOOT, new ActionSignalDispatcher());
leftFootHorizontalSwipe.dispatcher.addSignalListener(evt_kinectAction_horizontalSwipeWithLeftFoot);
ActionSignalDispatcher(leftFootHorizontalSwipe.dispatcher).addSecondSignalListener(evt_kinectAction_horizontalSwipeWithLeftFoot_Two);