Cannot upload file with updateProfile call

[[!outP]] <--! my snippet for viewing POST and FILES arrays -->
[[!UpdateProfile]]
[[+login.update_success:if=`[[+login.update_success]]`:is=`1`:then=`[[%login.profile_updated? &namespace=`login` &topic=`updateprofile`]]`]]
 
<h2>Profile editing:</h2>
<p>Enter your values and press Save:</p>
    <div class="updprof-error">[[+error.message]]</div>
<form class="form1" action="[[~8]]" method="post" enctype="multipart/form-data">
<table>
 <tr>
  <td>Avatar:<input type="file" name="file" id="file"/></td>
  <td><input type="submit" name="submit" value="Save"  /></td>
 </tr>
</table>
</form>

<?php
echo "<pre>";
echo "Array POST:";
print_r ($_POST);
echo "<br />";
echo "Array FILES:";
print_r ($_FILES);
echo "</pre>";

Array POST:Array
(
)
 
Array FILES:Array
(
)

Array POST:Array
(
    [submit] => Save
)
 
Array FILES:Array
(
    [file] => Array
        (
            [name] => poster.jpg
            [type] => image/jpeg
            [tmp_name] => /tmp/phpwpwxIX
            [error] => 0
            [size] => 31222
        )
 
)

<?php
/**
 * Login
 *
 * Copyright 2010-2012 by Shaun McCormick <[email protected]>
 *
 * Login is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * Login is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * Login; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * @package login
 */
/**
 * MODx UpdateProfile Snippet. Handles updating of User Profiles.
 *
 * @var modX $modx
 * @var Login $login
 * @var array $scriptProperties
 * 
 * @package login
 */
require_once $modx->getOption('login.core_path',null,$modx->getOption('core_path').'components/login/').'model/login/login.class.php';
$login = new Login($modx,$scriptProperties);

$controller = $login->loadController('UpdateProfile');
return $controller->run($scriptProperties);