onAfterOrderConfirm not triggering

<?php

defined('_JEXEC') or die('Restricted access');

?><?php

if(!@include_once(rtrim(JPATH_ADMINISTRATOR,DS).DS.'components'.DS.'com_hikashop'.DS.'helpers'.DS.'helper.php')){ return false; }

class plgHikashopkf_insert extends JPlugin

{

	function plgHikashopKashflow(&$subject, $config){

		parent::__construct($subject, $config);
		if(!isset($this->params)){
			$plugin =& JPluginHelper::getPlugin('hikashop', 'kf_insert');
			jimport('joomla.html.parameter');
			$this->params = new JParameter( $plugin->params );
		}

	}

		function onAfterOrderConfirm(&$order, &$methods, $method_id) {

    	if(!empty($order->order_id)){
		
		$orderClass = hikashop_get('class.order');
		$full_order = $orderClass->loadFullOrder($order->order_id, true, false);
		
require_once("**********.inc.php");
require_once("******.inc.php");

$username = "******";
$password = "*******";

//create variables
		
$order_user_id = $full_order->order_user_id;
		
mysql_connect("localhost", "*************", "**************") or die(mysql_error()); 
mysql_select_db("****************") or die(mysql_error()); 

$email = mysql_result(mysql_query("SELECT user_email FROM nl7xh_hikashop_user WHERE user_id = '".$order_user_id."';"), 0);
		
	foreach($full_order->products as $product){
	$cart = $product->order_product_name;
	$subtotal = $product->order_product_price;
	}
	$inv_name = $full_order->shipping_address->address_firstname . " " . $full_order->shipping_address->address_lastname; //ok
	$inv_addr1 = $full_order->shipping_address->address_street;
	$inv_addr2 = $full_order->shipping_address->address_city;
	$inv_state = $full_order->shipping_address->address_state;
	$inv_zip = $full_order->shipping_address->address_post_code;
	$inv_country = $full_order->shipping_address->address_country;
	$description = $cart;
	$qty = '1';
	$tax_rate = 20;
	$tel = $full_order->shipping_address->address_telephone;
	$shipping = $full_order->shipping->shipping_price;

// Kashflow will check if it's available and increment it if already used.
$invoice_number = 1;

// Uses format yyyy-mm-dd.
$invoice_date = date("Y-m-d"); // current date
$due_date = strtotime(date("Y-m-d", strtotime($invoice_date)) . " +30 days"); //net 30

// below is the nominal id code for Sale of Goods.
$nominal_id = 1236497;
$kashflow_customer_id; //First we will try to get this id from an email if not we will create it

//**************** Test For User ***************//


$kashflow = new Kashflow($username,$password);
$results = $kashflow->getCustomerByEmail($email);
	
//Checks to see if the email exists and creates a new account if not
if($results->StatusDetail == 'There is no customer with that email address'){
	$name = $inv_name;
	$address = $inv_addr1;
	$town = $inv_addr2;
	$state = $inv_state;
	$postcode = $inv_zip;
	$country = $inv_country;
	$tel = $tel;
	$newCustomerResults = $kashflow->insertCustomer($name,$address,$town,$state,$postcode,$country,$email,$telS); 
	$kashflow_customer_id = $newCustomerResults->InsertCustomerResult;	
}else{
	$kashflow_customer_id = $results->GetCustomerByEmailResult->CustomerID;
}

$unit_net = $subtotal + $shipping;

//This should be true unless you use bad data to create account.
if($kashflow_customer_id){
	// Connect to Kashflow.
	$kashflow = new Kashflow($username,$password);

	// Initialise the invoice.
	$invoice  = new KashflowInvoice($kashflow_customer_id,$invoice_number,$invoice_date,$due_date);
	
	// Add a line to the invoice: 1 unit, with a unit price of £10 @ 20% VAT.
	$invoice->addLine($qty,$unit_net,$unit_tax,$tax_rate,$nominal_id,$description);
		// Now insert the invoice on Kashflow.
	$response = $kashflow->insertInvoice($invoice);
	
	// Done - here's the response!
	echo "<pre>";
	print_r($response);
	echo "</pre>";
}else{

	echo "<p>CustomerID is not valid: ".$kashflow_customer_id."</p>";
}
       
    	}
		return true;
    }
	
}

?>

function onAfterOrderConfirm(&$order, &$methods, $method_id) {

function onAfterOrderCreate(&$order,&$send_email){