Actionscript 3 :: Ror #1009: Cannot Access A Property Or Method Of A Null Object Reference

Feb 4, 2011

I am building a website where I have one page where the user can draw on the screen. Everything works fine except for when I change from the drawing page to another page I get this error:

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

here is my code:

var color:Number;
stage.addEventListener(MouseEvent.MOUSE_DOWN, startDrawing);
stage.addEventListener(MouseEvent.MOUSE_UP, stopDrawing);[code].....

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