Newbie - There has to be an easier way to enlarge a mc and shrink mc on click

Question

First off I'm a newbie, so sorry -
What I am trying to do is make a image enlarge on click and then click it to go back to the original size. I am using TweenLite to achieve this. I am thinking that AS 3.0 code would be easier to do this. I tried it but was coming up with no error it only worked one time. So I was able to get it to work, sort of. Right now, it eases larger but when clicked again it jumps back down to the original size (no easing). I am not asking for you to do the code, unless you want to, I just was wondering if anyone knows where I could research it. I am new to AS 3.0 so forgive me. But, there has to be code for this.
Any help is greatly appreciated. File is attached if you want to see how a newbie can butcher a file.
I am using Flash CS4 ActionScript 3.0

Answer 1

Here is the code for the first frame.
stop();
import flash.events.MouseEvent;
import flash.net.URLRequest;
import gs.TweenLite;
import fl.transitions.*;
import fl.transitions.easing.*;
TweenLite.to(p17_mc, .5, {x:275.2, y:349.4, scaleX:1, scaleY:1});
TweenLite.to(black_mc, 0, {autoAlpha:0});
function main(event:MouseEvent):void {
MovieClip(root).gotoAndPlay("first");
trace ("something good just happened!");
p17_mc.addEventListener(MouseEvent.CLICK, main);
Code for the Second Frame.
stop();
import gs.TweenLite;
TweenLite.to(p17b_mc, 1, {x:250, y:100, scaleX:5, scaleY:5});
TransitionManager.start(blackb_mc, {type:Fade, direction:Transition.IN, duration:4, easing:Strong.easeOut});
function home(event:MouseEvent):void {
MovieClip(root).gotoAndPlay("firstfadeout");
trace ("going to fade out");
p17b_mc.addEventListener(MouseEvent.CLICK, home);
Code for the Third Frame.
TweenLite.to(p17b_mc, .5, {x:275.2, y:349.4, scaleX:1, scaleY:1});
TransitionManager.start(blackb_mc, {type:Fade, direction:Transition.OUT, duration:4, easing:Strong.easeIn});
gotoAndPlay("home");
trace ("going home");
Thanks