Help! error 1120!

programming flash
1

So i’m getting this 1120: Access of undefined property btnAbout.
and to me that means I’m missing an instance name or it spelled wrong and, it’s not.
i’m just trying to link my pages of my website together via the display list.
We did this in my class, and this should work fine but it isn’t.

I’m getting the error on my homepage screen

this is what I have:
package [COLOR=#000000]{[/COLOR]

[COLOR=#993300]import[/COLOR] flash.[COLOR=#000000]display[/COLOR].*;
[COLOR=#993300]import[/COLOR] flash.[COLOR=#000000]events[/COLOR].*;

[COLOR=#993300]public[/COLOR] [COLOR=#993300]class[/COLOR] HomePage [COLOR=#993300]extends[/COLOR] [COLOR=#993300]MovieClip[/COLOR] [COLOR=#000000]{[/COLOR]
    [COLOR=#F000F0]*// public static class constant to represent a custom event*[/COLOR]
    [COLOR=#993300]public[/COLOR] [COLOR=#993300]static[/COLOR] const COMPLETE:[COLOR=#993300]String[/COLOR] = [COLOR=#0000FF]"onComplete"[/COLOR];

    [COLOR=#F000F0]*// --------------------- constructor method*[/COLOR]
    [COLOR=#993300]public[/COLOR] [COLOR=#993300]function[/COLOR] HomePage[COLOR=#000000]([/COLOR][COLOR=#000000])[/COLOR][COLOR=#000000]{[/COLOR]
        [COLOR=#F000F0]*// add eventlisteners for screen*[/COLOR]
        btnAbout.[COLOR=#000000]addEventListener[/COLOR][COLOR=#000000]([/COLOR]MouseEvent.[COLOR=#000000]CLICK[/COLOR], onNext[COLOR=#000000])[/COLOR];
        
    [COLOR=#000000]}[/COLOR];
    
    [COLOR=#F000F0]*// --------------------- public methods  *[/COLOR]
    [COLOR=#993300]public[/COLOR] [COLOR=#993300]function[/COLOR] showMe[COLOR=#000000]([/COLOR]root:[COLOR=#993300]MovieClip[/COLOR][COLOR=#000000])[/COLOR]:[COLOR=#993300]void[/COLOR] [COLOR=#000000]{[/COLOR]
        [COLOR=#F000F0]*// other stuff that needs to be done when this screen is shown*[/COLOR]
        [COLOR=#F000F0]*// ...*[/COLOR]
        
        [COLOR=#F000F0]*// add this movieclip to the displaylist*[/COLOR]
        root.[COLOR=#000000]addChild[/COLOR][COLOR=#000000]([/COLOR][COLOR=#993300]this[/COLOR][COLOR=#000000])[/COLOR];
    [COLOR=#000000]}[/COLOR];
    
    [COLOR=#F000F0]*// --------------------- event handlers*[/COLOR]
    [COLOR=#993300]private[/COLOR] [COLOR=#993300]function[/COLOR] onNext[COLOR=#000000]([/COLOR][COLOR=#993300]e[/COLOR]:MouseEvent[COLOR=#000000])[/COLOR]:[COLOR=#993300]void[/COLOR] [COLOR=#000000]{[/COLOR]
        [COLOR=#993300]this[/COLOR].[COLOR=#000000]dispatchEvent[/COLOR][COLOR=#000000]([/COLOR][COLOR=#993300]new[/COLOR] Event[COLOR=#000000]([/COLOR]HomePage.[COLOR=#000000]COMPLETE[/COLOR][COLOR=#000000])[/COLOR][COLOR=#000000])[/COLOR];
    [COLOR=#000000]}[/COLOR];
    
[COLOR=#000000]}[/COLOR]

[COLOR=#000000]}[/COLOR]