Load movie fade in question

1

Hi,

Trying to fade in images on button activation. image fades in only on first button click. anybody know what I might be missing? Thanks.


import mx.transitions.Tween;
import mx.transitions.easing.*;
new Tween(image_mc, "_alpha", Strong.easeIn, 0, 100, 3, true);

port_btn.onRelease = function() {
	loadMovie("images/1.jpg", image_mc);
};
port2_btn.onRelease = function() {
	loadMovie("images/2.jpg", image_mc);
};