TCPDF Qr code resize on small size page - tcpdf

Question

I use this code for create a 80x30 mm pdf file with a 25x25 mm qrcode: I change the qrcode width and height but it doesn't resize and I always see a little qrcode into the page.
Where is the error?? Please help me... I can't undertand the problem! :)
<?php
require_once('../config/lang/eng.php');
require_once('../tcpdf.php');
// create new PDF document
$pdf = new TCPDF("L", "mm", array(80,30) , true, 'UTF-8', false);
//set margins
$pdf->SetMargins(0, PDF_MARGIN_TOP, 0);
$pdf->SetHeaderMargin(0);
$pdf->SetFooterMargin(0);
$pdf->setPrintHeader(false);
$pdf->setPrintFooter(false);
//set auto page breaks
$pdf->SetAutoPageBreak(false, 0);
//set image scale factor
$pdf->setImageScale(1);
//set some language-dependent strings
$pdf->setLanguageArray($l);
// add a page
$pdf->AddPage();
$pdf->SetAutoPageBreak(false, 0);
// new style
$style = array(
'border' => false,
'padding' => 'auto',
'fgcolor' => array(0,0,0),
'bgcolor' => false
);
$pdf->write2DBarcode('http://www.google.it/', 'QRCODE,H', 50, 1, 300, 300, $style, 'N');
// ---------------------------------------------------------
//Close and output PDF document
$pdf->Output('test.pdf', 'I');
//============================================================+
// END OF FILE
//============================================================+
?>
Thank you!!!

Answer 1

Problem solved:
Before:
[...]
$pdf = new TCPDF("L", "mm", array(80,30) , true, 'UTF-8', false);
[...]
$pdf->AddPage();
[/code]
After:
[code]
[...]
$pdf = new TCPDF("P", "mm", array(80,30) , true, 'UTF-8', false);
[...]
$pdf->AddPage('L', '', false, false);
[/code]
The problem is the constructor page orientation that create confusion to the system: default portrait is ok, I have only to change the Add page orientation to Landscape and the problem is solved.
Thank you again for the attention.
:)