actionscript 3 - AS3 embedded tween only partially showing -

when addchild movie clip 60 frames embedded tween, last few frames playing when running swf. why?

function onclick10f2(e: mouseevent) {         addchild(gdropball1)     gdropball1.x = 356.10;     gdropball1.y = 28; } 

problem solved gdropball1.gotoandplay(1);

function onclick10f2(e: mouseevent) {     gdropball1.gotoandplay(1);         addchild(gdropball1)     gdropball1.x = 356.10;     gdropball1.y = 28;