Add Multi Products

[RikC3]

I've installed the next contribution:

http://www.oscommerce.com/community/contributions,1129

Now i got on the productlisting 1 form.

When i press on the button_buy_now there is no product added at the cart.

This is the code I added at application_top.php.

 

///////////////////////////////////////// Products Multi //////////////////////
    // multi_product_add
  case 'add_multi':
    for ($i=0; $i<=sizeof($HTTP_POST_VARS['products_id']); $i++) {
	  if($_POST['add_id'][$i] >= 1)
	    $cart->add_cart($HTTP_POST_VARS['products_id'][$i], $cart->get_quantity(tep_get_uprid($HTTP_POST_VARS['products_id'][$i], $HTTP_POST_VARS['id'][$i]))+($HTTP_POST_VARS['add_id'][$i]), $HTTP_POST_VARS['id'][$i]);
    }
	  tep_redirect(tep_href_link(FILENAME_DEFAULT, tep_get_all_get_params($parameters), 'NONSSL'));
  break;
///////////////////////////////////////// Products Multi //////////////////////

please help me with add the products again at the cart.