X-Cart forums - search.php problem

When I go to this link:

http://www.godwintool.com/store/xcart/customer/search.php

It displays all the products instead of showing me the advanced search page. Is this supposed to happen? Am I supposed to pass some variables through search.php to display the advanced search page?

I didn't make any modifications to search.php so I don't understand what is going wrong.

Here is search.php:

Code:

#

# $Id: search.php,v 1.26 2002/06/13 10:06:10 zorg Exp $

#



require "../smarty.php";

require "../config.php";

@include "./https.php";

require "./auth.php";

require "../include/categories.php";



#

# Permorfm SQL search query

#



$search_category = addslashes(array_pop(func_query_first("select category from categories where categoryid='$in_category'")));



$search_query = "(products.product like '%$substring%' or products.descr like '%$substring%') and categories.category like '$search_category%' and products.forsale='Y' group by products.productid";



$total_products_in_search = count(func_search_products($search_query, $user_account['membership']));



#

# Navigation code

#

$total_nav_pages = ceil($total_products_in_search/$products_per_page)+1;

require "../include/navigation.php";



$smarty->assign("products",func_search_products($search_query." limit $first_page, $products_per_page", $user_account['membership']));



$smarty->assign("navigation_script","search.php?substring=".urlencode($substring)."&in_category=$in_category");



$HTTP_GET_VARS["substring"] = stripslashes($HTTP_GET_VARS["substring"]);



$smarty->assign("main","search");

$smarty->display("customer/home.tpl");

?>

Any help would be appreicated. Thanks.