Target path problem?

programming flash
1

Hello i’m trying to control a movie clip called “nosotrosmc” with a frame label inside called “historia” but does not work

this is the code:


menu.nosotros.addEventListener(MouseEvent.CLICK, subSeccion);

function subSeccion(e:MouseEvent){
    trace(""+e.target.name+"boton clicked");
    this.nosotrosmc.gotoAndStop("historia");
}

the output window show this:

nosotrosboton clicked
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at HomeSonny_fla::MainTimeline/subSeccion()

I need to made a simple navigation, i’m a designer, not a programmer, as3 is confuse and very disappointing.:frowning:
Somebody can explain to me what am i doing wrong ?