calling a function on the main timeline from a class file

Hi,

when I try to call a function on the maintime line from a class file i get :

TypeError: Error #1006: redArrowAlpha is not a function.

the code is simple:


//blueArrow_select function is called from an addEventListener and works fine...

public function blueArrow_select(e:MouseEvent):void
      {
                  
                  MovieClip(parent).redArrowAlpha();

 
                 }


then in the main time line a simple function...

function redArrowAlpha():void
            {
                  
                  TweenLite.to(redArrow, 5, { alpha:0, ease:Circ.easeOut});
            }



thanks