[RESOLVED] nextFrame() problem

[billiondegreedr]

I am trying to put a MC,to traverse through the frames in my fla.It has got two layers.I layer got 3 separate frames,which contains the contents that i want to show the user in every frame.The top layer got one common frame(that extends from 1-3)and got the AS3 for the NextMC. Here is the code:

NextMC.addEventListener(MouseEvent.CLICK,NextFrame);

function NextFrame(event:MouseEvent):void {
    nextFrame();
}

It traverses from 1st frame to second.But when i Click NextMC in 2nd frame,it gives me an error:

TypeError: Error #1009: Cannot access a property or method of a null object reference.
	at Estimate1_fla::MainTimeline/NextFrame()

Why is that?the AS3 layer got its listener,do I have to write listeners on every frame?

[billiondegreedr]

Found it,an instance was not in stage.
Please delete this thread.