The new order email template is rendering everything except the product image of the order.

This is how the template was trying to call it by default, which doesn't work:

{{layout handle="sales_email_order_items" order=$order}}

This is the error:

Can anyone advise on what might be the problem.

The new order email template is rendering everything except the product image of the order.

This is how the template was trying to call it by default, which doesn't work:

{{layout handle="sales_email_order_items" order=$order}}

This is the error:

Can anyone advise on what might be the problem.

This is the function i worte:

app/design/frontend/base/default/template/email/order/items/order/default.phtml <?php

if ($_item->getProductType() == Mage_Catalog_Model_Product_Type::TYPE_CONFIGURABLE) {
    $parentId = Mage::getModel('catalog/product_type_configurable')
                       ->getParentIdsByChild($_item->getProductId());  
    $_product = Mage::getModel('catalog/product')  
                       ->setStoreId($_item->getOrder()->getStoreId())  
                       ->load($parentId);
} else {
    $_product = Mage::getModel('catalog/product')  
                       ->setStoreId($_item->getOrder()->getStoreId())  
                       ->load($_item->getProductId());  
}

?>

this is display code:

<img src="<?php echo Mage::getModel('catalog/product_media_config')  
                        ->getMediaUrl($_product->getThumbnail()); ?>"  width="135" height="135" alt="<?php echo $_item->getName() ?>" />