Tween speed?

programming flash
1

Hey peepz! I’ve got this code for a button; It works, but when I want the tween to go faster, and I change the speed of the tween (red txt) to a numer smaller than 1 - for instance 0.5 - the button works as long as you don’t click it - when you click it it starts flippin’! Anyone any thoughts?

import fl.transitions.Tween;
import fl.transitions.easing.*;

link_mc.addEventListener(MouseEvent.ROLL_OVER, goOver);
function goOver(event:MouseEvent):void {
	var overPosition = over_mc.y;
	var myTween:Tween = new Tween(over_mc, "y", Strong.easeOut, overPosition, 0, [COLOR="Red"]1[/COLOR], true);
}
link_mc.addEventListener(MouseEvent.ROLL_OUT, goOut);
function goOut(event:MouseEvent):void {
	var overPosition = over_mc.y;
	var myTween:Tween = new Tween(over_mc, "y", Strong.easeOut, overPosition, 48, [COLOR="red"]1[/COLOR], true);
}