pdf file problem in codeigniter php

function pdf_create()
{
    $this->load->library('cezpdf');
    $db_data[] = array('name' => 'Jon Doe', 'phone' => '111-222-3333', 'email' => 'jdoe@someplace.com');
    $db_data[] = array('name' => 'Jane Doe', 'phone' => '222-333-4444', 'email' => 'jane.doe@something.com');
    //$db_data[] = array('name' => 'Jon Smith', 'phone' => '333-444-5555', 'email' => 'jsmith@someplacepsecial.com');

    $col_names = array(
    'name' => 'Name',
    'phone' => 'Phone Number',
    'email' => 'E-mail Address'
    );

    $this->cezpdf->ezTable($db_data, $col_names, 'Contact List', array('width'=>550));
    $this->cezpdf->ezStream();
}