[Papervision3D] add/remove Event Listener for an Interactive Material..

[mikotondria]

Halloo...

In my app, I have set up an InteractiveMovieAssetMaterial, then added an
eventListener to it, that calls a function, thusly:

//____inside function that creates a plane and adds it to the 'scene'..
var biosmaterial:InteractiveMovieAssetMaterial =  new
InteractiveMovieAssetMaterial("bios", initMats);
biosmaterial.movie.addEventListener(MouseEvent.CLICK, handleMainClick);


when the plane that uses this material is clicked, I want to remove the
event listener (the plane becomes the background for some 2nd level
content), and I thought I could just refer to the biosmaterial.movie, as I
did when I constructed it..by:

public function handleMainClick(e:MouseEvent):void {
	//trace("you clicked", e.currentTarget);
	biosmaterial.movie.removeEventListener(MouseEvent.CLICK, handleMainClick);
}

but I am getting the ubiquitous:

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

What do I need to do to access this material's movie, or am I going about it
all wrongly :/

Mr Grden, if you have 0.8 seconds, I would be eternally grateful, lol :D

Many thanks talented people.



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