Choisir un mode de paiement juste pour information

<filename plugin="collectondelivery">collectondelivery_b.php</filename>
		<filename>collectondelivery_b_end.php</filename>
		<filename>collectondelivery_b_configuration.php</filename>

$element->payment_type=$this->collectondelivery_b;

Fatal error: Call to a member function display() on a non-object in ***/plugins/hikashoppayment/collectondelivery_b/collectondelivery_b_configuration.php on line 18

<?php
/**
 * @package		HikaShop for Joomla!
 * @version		1.5.6
 * @author		hikashop.com
 * @copyright	(C) 2010-2012 HIKARI SOFTWARE. All rights reserved.
 * @license		GNU/GPLv3 http://www.gnu.org/licenses/gpl-3.0.html
 */
defined('_JEXEC') or die('Restricted access');
?>
<?php
class plgHikashoppaymentCollectondeliveryb extends JPlugin
{
    function onPaymentDisplay(&$order,&$methods,&$usable_methods){
    	if(!empty($methods)){
    		foreach($methods as $method){
				if($method->payment_type!='collectondelivery_b' || !$method->enabled){
					continue;
				}
				if(!empty($method->payment_zone_namekey)){
					$zoneClass=hikashop_get('class.zone');
	    			$zones = $zoneClass->getOrderZones($order);
					if(!in_array($method->payment_zone_namekey,$zones)){
						return true;
					}
				}

				$usable_methods[$method->ordering]=$method;
    		}
    	}
    	return true;
    }
    function onPaymentSave(&$cart,&$rates,&$payment_id){
    	$usable = array();
    	$this->onPaymentDisplay($cart,$rates,$usable);
    	$payment_id = (int) $payment_id;
    	foreach($usable as $usable_method){
    		if($usable_method->payment_id==$payment_id){
    			return $usable_method;
    		}
    	}
    	return false;
    }
    function onPaymentConfiguration(&$element){
    	$this->collectondelivery_b = JRequest::getCmd('name','collectondelivery_b');
    	if(empty($element)){
    		$element = null;
    		$element->payment_name='Collect on delivery';
    		$element->payment_description='You can pay when your package is delivered by using this payment method.';
    		$element->payment_images='Collect_on_delivery';
    		$element->payment_type=$this->collectondeliver_b;
    		$element->payment_params=null;
    		$element->payment_params->order_status='created';
    		$element = array($element);
    	}
    	$bar = & JToolBar::getInstance('toolbar');
		JToolBarHelper::save();
		JToolBarHelper::apply();
		JToolBarHelper::cancel();
		JToolBarHelper::divider();
		$bar->appendButton( 'Pophelp','payment-collectondelivery_b-form');
		hikashop_setTitle(JText::_('COLLECT_ON_DELIVERY'),'plugin','plugins&plugin_type=payment&task=edit&name='.$this->collectondelivery_b);
		$app =& JFactory::getApplication();
		$app->setUserState( HIKASHOP_COMPONENT.'.payment_plugin_type', $this->collectondelivery_b);
		$this->category = hikashop_get('type.categorysub');
		$this->category->type = 'status';
    }
	function onPaymentConfigurationSave(&$element){
    	return true;
    }
    function onAfterOrderConfirm(&$order,&$methods,$method_id){
    	$method =& $methods[$method_id];
    	$orderObj = null;
    	$orderObj->order_status = $method->payment_params->order_status;
    	$orderObj->history->history_notified = @$method->payment_params->status_notif_email;
    	$orderObj->order_id = $order->order_id;
    	$orderClass = hikashop_get('class.order');
    	$orderClass->save($orderObj);
    	$app =& JFactory::getApplication();
    	$this->removeCart = true;
		$name = $method->payment_type.'_end.php';
    	$path = JPATH_THEMES.DS.$app->getTemplate().DS.'hikashoppayment'.DS.$name;
    	if(!file_exists($path)){
    		if(version_compare(JVERSION,'1.6','<')){
    			$path = JPATH_PLUGINS .DS.'hikashoppayment'.DS.$name;
    		}else{
    			$path = JPATH_PLUGINS .DS.'hikashoppayment'.DS.$method->payment_type.DS.$name;
    		}
    		if(!file_exists($path)){
    			return true;
    		}
    	}
    	$currencyClass = hikashop_get('class.currency');
    	$amount = $currencyClass->format($order->order_full_price,$order->order_currency_id);
    	$order_number = $order->order_number;
    	require($path);
		return true;
    }
}

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE install SYSTEM "http://dev.joomla.org/xml/1.5/plugin-install.dtd">
<install type="plugin" version="1.5" method="upgrade" group="hikashoppayment">
	<name>Hikashop Collect On Delivery Payment Plugin B</name>
	<creationDate>April 2010</creationDate>
	<version>1.0.0</version>
	<author>Hikashop</author>
	<authorEmail>dev@hikashop.com</authorEmail>
	<authorUrl>http://www.hikashop.com</authorUrl>
	<copyright>Copyright (C) 2010 HIKARI SOFTWARE SARL - All rights reserved.</copyright>
	<license>http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL</license>
	<description>This plugin enables you to setup your Collect On Delivery payment system</description>
	<files>
		<filename plugin="collectondelivery_b">collectondelivery_b.php</filename>
		<filename>collectondelivery_b_end.php</filename>
		<filename>collectondelivery_b_configuration.php</filename>
	</files>
	<params addpath="/components/com_hikashop/params">
		<param name="pluginoptions" type="pluginoptions" default="plugin" label="hikashop" description="HikaShop options" />
	</params>
	<config>
		<fields name="params" addfieldpath="/components/com_hikashop/fields">
			<fieldset name="basic">
				<field
                        id="pluginoptions"
                        name="pluginoptions"
                        type="pluginoptions"
                        label="hikashop"
                        description="HikaShop options"
                />
            </fieldset>
		</fields>
	</config>
</install>