Problem with fading

programming flash
1

[COLOR=Black]Hello. I am trying to fade in and out 2 movie clips when a button is pressed. Here is my AS, but it is not fading the content in and out. I have ran it through in my head a couple of times and is seems to be fine. I don’t know whats happening.
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[/COLOR] [SIZE=1][COLOR=Black]Button AS:[/COLOR][/SIZE][COLOR=Black]
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on(release){
    PreviousContent = Content;
    Content = Info;
    stageListener.onResize();
}
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[SIZE=1]
frame AS:[/SIZE]
[COLOR=Black] [/COLOR][COLOR=Black]


var Content = Info;
var PreviousContent;

Portfolio._alpha = 0;
Services._alpha = 0;
Contact._alpha = 0;

var stageListener:Object = new Object();
stageListener.onResize = function ()
{
    fade(PreviousContent, 0); //Fade previous content to zero
    fade(Content, 100); //Fade new content to 100
}
Stage.addListener(stageListener);

function fade(mc, alpha){
    this.onEnterFrame = function(){
        if (Math.round(mc._alpha)>alpha) this.dir = -1;
        else this.dir = 1;
        this._alpha += this.dir;
    }
}
}

stageListener.onResize();

Any ideas why this is not fadeing the content in and out?
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