Surcharge Module not working. HELP?

Hi,

I've tried implementing this ot_surcharge module in ot_totals and it's not displaying in the Order Total's section at the end of the checkout process.

Can you see why this doesn't work?

<?php /* $Id: ot_surcharge.php,v 1.0 2003/06/19 01:13:43 hpdl wib $ Zen-cart, Open Source E-Commerce Solutions Copyright (c) 2002 osCommerce Released under the GNU General Public License */ class ot_surcharge { var $title, $output; function ot_surcharge() { $this->code = 'ot_surcharge'; $this->title = MODULE_PAYMENT_TITLE; $this->description = MODULE_PAYMENT_DESCRIPTION; $this->enabled = MODULE_PAYMENT_STATUS; $this->sort_order = MODULE_PAYMENT_SORT_ORDER; $this->include_shipping = MODULE_PAYMENT_INC_SHIPPING; $this->include_tax = MODULE_PAYMENT_INC_TAX; $this->percentage = MODULE_PAYMENT_PERCENTAGE; $this->minimum = MODULE_PAYMENT_MINIMUM; $this->calculate_tax = MODULE_PAYMENT_CALC_TAX; //$this->credit_class == true; $this->output = array(); } function process() { global $order, $currencies; $od_amount = $this->calculate_fee($this->get_order_total()); if ($od_amount>0) { $this->addition = $od_amount; $this->output[] = array('title' => $this->title . ':', 'text' => '<b>' . $currencies->format($od_amount) . '</b>', 'value' => $od_amount); $order->info['total'] = $order->info['total'] + $od_amount; } } function calculate_fee($amount) { global $order, $customer_id, $payment; $od_amount=0; $od_pc = $this->percentage; //this is percentage $do = false; if ($amount > $this->minimum) { $table = split("[,]" , MODULE_PAYMENT_TYPE); for ($i = 0; $i < count($table); $i++) { if ($payment == $table[$i]) $do = true; } if ($do) { // Calculate tax reduction if necessary if($this->calculate_tax == 'true') { // Calculate main tax reduction $tod_amount = round($order->info['tax']*10)/10*$od_pc/100; $order->info['tax'] = $order->info['tax'] + $tod_amount; // Calculate tax group deductions reset($order->info['tax_groups']); while (list($key, $value) = each($order->info['tax_groups'])) { $god_amount = round($value*10)/10*$od_pc/100; $order->info['tax_groups'][$key] = $order->info['tax_groups'][$key] + $god_amount; } } $od_amount = round($amount*10)/10*$od_pc/100 + .35;//percentage plus base fee $od_amount = $od_amount + $tod_amount; } } return $od_amount; } function get_order_total() { global $db, $order, $cart; $order_total = $order->info['total']; // Check if gift voucher is in cart and adjust total $products = $_SESSION['cart']->get_products(); for ($i=0; $i<sizeof($products); $i++) { $t_prid = zen_get_prid($products[$i]['id']); $gv_result = $db->Execute("select products_price, products_tax_class_id, products_model from " . TABLE_PRODUCTS . " where products_id = '" . $t_prid . "'"); if (ereg('^GIFT', addslashes($gv_result['products_model']))) { $qty = $cart->get_quantity($t_prid); $products_tax = zen_get_tax_rate($gv_result['products_tax_class_id']); if ($this->include_tax =='false') { $gv_amount = $gv_result['products_price'] * $qty; } else { $gv_amount = ($gv_result['products_price'] + zen_calculate_tax($gv_result['products_price'],$products_tax)) * $qty; } $order_total=$order_total - $gv_amount; } } if ($this->include_tax == 'false') $order_total=$order_total-$order->info['tax']; if ($this->include_shipping == 'false') $order_total=$order_total-$order->info['shipping_cost']; return $order_total; } function check() { global $db; if (!isset($this->_check)) { $check_query = $db->Execute("select configuration_value from " . TABLE_CONFIGURATION . " where configuration_key = 'MODULE_PAYMENT_STATUS'"); $this->_check = $check_query->RecordCount(); } return $this->_check; } function keys() { return array('MODULE_PAYMENT_STATUS', 'MODULE_PAYMENT_SORT_ORDER','MODULE_PAYMENT_PERCENTAGE','MODULE_PAYMENT_MINIMUM', 'MODULE_PAYMENT_TYPE', 'MODULE_PAYMENT_INC_SHIPPING', 'MODULE_PAYMENT_INC_TAX', 'MODULE_PAYMENT_CALC_TAX'); } function install() { global $db; $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, set_function, date_added) values ('Display Total', 'MODULE_PAYMENT_STATUS', 'true', 'Do you want to enable the Order Payment Fee?', '6', '1','zen_cfg_select_option(array(\'true\', \'false\'), ', now())"); $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Sort Order', 'MODULE_PAYMENT_SORT_ORDER', '888', 'Sort order of display.', '6', '2', now())"); $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, set_function ,date_added) values ('Include Shipping', 'MODULE_PAYMENT_INC_SHIPPING', 'true', 'Include Shipping in calculation', '6', '5', 'zen_cfg_select_option(array(\'true\', \'false\'), ', now())"); $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, set_function ,date_added) values ('Include Tax', 'MODULE_PAYMENT_INC_TAX', 'true', 'Include Tax in calculation.', '6', '6','zen_cfg_select_option(array(\'true\', \'false\'), ', now())"); $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Surcharge Percentage', 'MODULE_PAYMENT_PERCENTAGE', '3', 'Amount of Surcharge(percentage).', '6', '7', now())"); $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, set_function ,date_added) values ('Calculate Tax', 'MODULE_PAYMENT_CALC_TAX', 'false', 'Re-calculate Tax on surcharged amount.', '6', '5','zen_cfg_select_option(array(\'true\', \'false\'), ', now())"); $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Minimum Amount', 'MODULE_PAYMENT_MINIMUM', '', 'Minimum order before fee', '6', '2', now())"); $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Payment Type', 'MODULE_PAYMENT_TYPE', 'cc', 'Payment Type to pay surcharge', '6', '2', now())"); } function remove() { global $db; $keys = ''; $keys_array = $this->keys(); $keys_size = sizeof($keys_array); for ($i=0; $i<$keys_size; $i++) { $keys .= "'" . $keys_array[$i] . "',"; } $keys = substr($keys, 0, -1); $db->Execute("delete from " . TABLE_CONFIGURATION . " where configuration_key in (" . $keys . ")"); } } ?>

Thanks!