PrintJob why does it clear the screen?

1

I have written a colouring board/whiteboard app and it’s in use.

A small problem is just driving me bananas:

When a user has drawn a picture and printed it (PrintJob function)
the drawing board is cleared. I don’t know why this is happening.

PrintJob code is: (the drawing is held in _root.canvas)

// PRINTING
this.print_btn.onPress = function() {

var printit : printJob = new PrintJob();
if (printit.start()) {

var numPages:Number = 0;

if (printit.addPage(_root.canvas,{xMin:0,xMax:750,yMin:0,yMax:575})) {
numPages++;
};

if (numPages > 0) {
printit.send(); // print page(s)
}
delete printit;

_root.createEmptyMovieClip(“canvas”, 0);

} else {
trace(“PrintJob.start() failed”);
}
}

Any A.S. gurus can help me out here ?:hangover: