OSCommerce admin pages show 401

Problem

The OSCommerce admin pages were working fine a couple months ago.  Now I go to it and it shows a 401 error.

Solution

The problem was that the htaccess file had a rewrite added to it to always include www to the address.  Apparently the SEO guy did this.  The solution is to update the OSCommerce configuration files.  Meaning add “www” to the address variables in

includes/configure.php
includes/admin/configure.php

source: http://forums.oscommerce.com/topic/341940-how-to-change-htaccess-to-rewrite-the-url-hard/
http://forums.jaguarpc.com/design-development/24039-just-installed-oscommerce-admin-links-giving-401-authentication-failed.html

keywords: oscommerce 401