help printing textarea

Hello,

I have problem printing textarea when sending it to print job and here my code:

<mx:TextArea id="mainTextField" styleName="letterTextArea" wordWrap="true" x="46" y="38" width="666" height="389" horizontalScrollPolicy="off"/>

private function printLetter():void
            {
                var printJob:PrintJob = new PrintJob();
                printJob.copies = 1;
                printJob.orientation = PrintJobOrientation.PORTRAIT;
               
                //var rect:Rectangle = new Rectangle(0,0,800,600);
               
                printJob.start();
           
                try
                {
                    printJob.addPage(mainTextField);
                    printJob.send();
                }
                catch(err:Error)
                {
                    //Alert.show("Error printing letter: "+err);
                }
            }

...the only printed in the printer is the visible part of textarea. How can I print the entire text? any idea?

thanks a lot.

cheers.