printing png image using printjob

[jlackyashdya]

HI,
I have one movie clip which is having extenally loaded png image. Now i want to print it. Its printing but showing one white box behind the image that means its not printing transparent image.

My code is as follows:


on(release)
{
trace("print");
var my_pj = new PrintJob();
var myResult = my_pj.start();
if(myResult){
myResult = my_pj.addPage (0, {xMin : 0, xMax: 776, yMin: 0,
yMax: 593});
myResult = my_pj.addPage (_parent.main_mc, {xMin : -300, xMax: 776,
yMin: 400, yMax: 593},{printAsBitmap:true}, 1);
myResult = my_pj.addPage (1, null,{printAsBitmap:true}, 2);
myResult = my_pj.addPage (0);

my_pj.send();
}
delete my_pj;
}
Please reply..