Shipping Contribution Error

[metalkakkarot]

i have installed this module

 

http://www.oscommerce.com/community/contri...arch,royal+mail

 

and i get this error when it comes to checking out..

 

Warning: Division by zero in /www/u/ukislamicdre/htdocs/includes/classes/shipping.php on line 61

 

Warning: Division by zero in /www/u/ukislamicdre/htdocs/includes/classes/shipping.php on line 62

 

this is what i have in shipping.php

 

<?php

/*

$Id: shipping.php,v 1.23 2003/06/29 11:22:05 hpdl Exp $

 

osCommerce, Open Source E-Commerce Solutions

http://www.oscommerce.com

 

Copyright © 2003 osCommerce

 

Released under the GNU General Public License

*/

 

class shipping {

var $modules;

 

// class constructor

function shipping($module = '') {

global $language, $PHP_SELF;

 

if (defined('MODULE_SHIPPING_INSTALLED') && tep_not_null(MODULE_SHIPPING_INSTALLED)) {

$this->modules = explode(';', MODULE_SHIPPING_INSTALLED);

 

$include_modules = array();

 

if ( (tep_not_null($module)) && (in_array(substr($module['id'], 0, strpos($module['id'], '_')) . '.' . substr($PHP_SELF, (strrpos($PHP_SELF, '.')+1)), $this->modules)) ) {

$include_modules[] = array('class' => substr($module['id'], 0, strpos($module['id'], '_')), 'file' => substr($module['id'], 0, strpos($module['id'], '_')) . '.' . substr($PHP_SELF, (strrpos($PHP_SELF, '.')+1)));

} else {

reset($this->modules);

while (list(, $value) = each($this->modules)) {

$class = substr($value, 0, strrpos($value, '.'));

$include_modules[] = array('class' => $class, 'file' => $value);

}

}

 

for ($i=0, $n=sizeof($include_modules); $i<$n; $i++) {

include(DIR_WS_LANGUAGES . $language . '/modules/shipping/' . $include_modules[$i]['file']);

include(DIR_WS_MODULES . 'shipping/' . $include_modules[$i]['file']);

 

$GLOBALS[$include_modules[$i]['class']] = new $include_modules[$i]['class'];

}

}

}

 

function quote($method = '', $module = '') {

global $total_weight, $shipping_weight, $shipping_quoted, $shipping_num_boxes;

 

$quotes_array = array();

 

if (is_array($this->modules)) {

$shipping_quoted = '';

$shipping_num_boxes = 1;

$shipping_weight = $total_weight;

 

if (SHIPPING_BOX_WEIGHT >= $shipping_weight*SHIPPING_BOX_PADDING/100) {

$shipping_weight = $shipping_weight+SHIPPING_BOX_WEIGHT;

} else {

$shipping_weight = $shipping_weight + ($shipping_weight*SHIPPING_BOX_PADDING/100);

}

 

if ($shipping_weight > SHIPPING_MAX_WEIGHT) { // Split into many boxes

$shipping_num_boxes = ceil($shipping_weight/SHIPPING_MAX_WEIGHT);

$shipping_weight = $shipping_weight/$shipping_num_boxes;

}

 

$include_quotes = array();

 

reset($this->modules);

while (list(, $value) = each($this->modules)) {

$class = substr($value, 0, strrpos($value, '.'));

if (tep_not_null($module)) {

if ( ($module == $class) && ($GLOBALS[$class]->enabled) ) {

$include_quotes[] = $class;

}

} elseif ($GLOBALS[$class]->enabled) {

$include_quotes[] = $class;

}

}

 

$size = sizeof($include_quotes);

for ($i=0; $i<$size; $i++) {

$quotes = $GLOBALS[$include_quotes[$i]]->quote($method);

if (is_array($quotes)) $quotes_array[] = $quotes;

}

}

 

return $quotes_array;

}

 

function cheapest() {

if (is_array($this->modules)) {

$rates = array();

 

reset($this->modules);

while (list(, $value) = each($this->modules)) {

$class = substr($value, 0, strrpos($value, '.'));

if ($GLOBALS[$class]->enabled) {

$quotes = $GLOBALS[$class]->quotes;

for ($i=0, $n=sizeof($quotes['methods']); $i<$n; $i++) {

if (isset($quotes['methods'][$i]['cost']) && tep_not_null($quotes['methods'][$i]['cost'])) {

$rates[] = array('id' => $quotes['id'] . '_' . $quotes['methods'][$i]['id'],

'title' => $quotes['module'] . ' (' . $quotes['methods'][$i]['title'] . ')',

'cost' => $quotes['methods'][$i]['cost']);

}

}

}

}

 

$cheapest = false;

for ($i=0, $n=sizeof($rates); $i<$n; $i++) {

if (is_array($cheapest)) {

if ($rates[$i]['cost'] < $cheapest['cost']) {

$cheapest = $rates[$i];

}

} else {

$cheapest = $rates[$i];

}

}

 

return $cheapest;

}

}

}

?>

 

 

 

hope you can help...thans