AddFonts仍然无法正常工作

Everything what I do is like in documentation of fpdf but it still doesn't show UTF-8 letters. Result of the following cod is 'Zażółć gęślÄ… jaźń' but I write 'Zażółć gęślą jaźń'

<?php
    require('fpdf/fpdf.php');
    define('FPDF_FONTPATH','font');
    $pdf=new FPDF();
    $pdf->Open();
    $pdf->AddFont('arial_ce','','arial_ce.php');

    $pdf->AddPage();

    $pdf->SetFont('arial_ce','',35); //normalna
    $pdf->Ln(10);
    $pdf->Cell(0,10,'Zażółć gęślą jaźń');


    $pdf->Output();
    ?>