Обратная связь не присылает имя отправителя - Joomla 2.5: Общие вопросы

<?php

 /**
 * @package		Joomla.Site
 * @subpackage	com_contact
 * @copyright	Copyright (C) 2005 - 2014 Open Source Matters, Inc. All rights reserved.
 * @license		GNU General Public License version 2 or later; see LICENSE.txt
 */
defined('_JEXEC') or die;
JHtml::_('behavior.keepalive');
JHtml::_('behavior.formvalidation');
JHtml::_('behavior.tooltip');
 if (isset($this->error)) : ?>
	<div class="contact-error">
		<?php echo $this->error; ?>
	</div>
<?php endif; ?>

<div class="contact-form">
	<form id="contact-form" action="<?php echo JRoute::_('index.php'); ?>" method="post" class="form-validate" style="overflow-x: hidden !important">
	
		<input type="hidden" name="nospam:blank" value="" style="overflow-x: hidden !important"/>
		
		<div class="input-field col s6">
			<input id="last_name" type="text" class="validate required" name="jform[contact_name]">
			<label for="last_name">Ваше имя <span class="required">*</span></label>
		</div>
						
		<div class="input-field col s12">
			<input id="email" type="email" name="jform[contact_email]" class="validate required">
			<label for="email" data-error="неверно" data-success="правильно">Email <span class="required">*</span></label>
		</div>
						
		<div class="input-field col s12">
			<textarea id="textarea1" class="materialize-textarea required" name="jform[contact_message]" value=""></textarea>
			<label for="textarea1 text">Сообщение <span class="required">*</span></label>
		</div>
				
		<div class="control-group">
			<div class="controls">
				<div align="center"><input class="btn submit_button" type="submit" id="sendButton" disabled="disabled" value="Отправить" onclick="eventAfterSend()" /></div>
				<input type="hidden" name="option" value="com_contact" />
				<input id="topic" type="hidden" class="validate required" name="jform[contact_subject]" value="Обратная связь">
				<input type="hidden" name="task" value="contact.submit" />
				<input type="hidden" name="return" value="<?php echo $this->return_page;?>" />
				<input type="hidden" name="id" value="<?php echo $this->contact->slug; ?>" />
				<?php echo JHtml::_( 'form.token' ); ?>
			</div>
		</div>
	</form>
	
	<script>
		window.eventAfterSend = function ()
		{
			window.parent.Materialize.toast('Сообщение отправлено!', 4000);
			window.parent.$("#modalMail").modal('close'); /* Закрываем модальное окно*/
			window.parent.location.reload(); /* Перезагрузка фрейма */
		}
	</script>
	
	<!-- Скрипт проверки полей в форме обр связи -->
	<script>
		var pattern = /^([a-z0-9_\.-])+@[a-z0-9-]+\.([a-z]{2,4}\.)?[a-z]{2,4}$/;
		$('#email, #last_name, #textarea1').keyup(function(){
			$('#sendButton').prop('disabled', !pattern.test($('#email').val()) || $('#last_name').val().length <= 5 || $('#textarea1').val().length <= 5 );
		});
	</script>
	<!-- /Скрипт проверки полей в форме обр связи -->
</div>

...
<div class="input-field col s6">
  <input id="last_name" type="text" class="validate required" name="jform[contact_name]">
  <label for="last_name">Ваше имя <span class="required">*</span></label>
</div>
...

.... action="<?php echo JRoute::_('index.php'); ?>