[lexa2000lexa]

поробуйде так

var rNum = _totalframes;
 
var i:Number = 3;
while (i<rNum) {
	duplicateMovieClip("push_mc","push_mc_"+i,i);
	push_mc._x=push_mc._x+20;
	this["push_mc_"+i].id = i;
	i++;
}

а в кнопке

this.onRelease = function() {
	trace(this.id)
};

должно работь.