In order to CONFIGURE OSCOMMERCE to work properly with another DOMAIN, you should modify the two configure.php files in includes/ and admin/includes/ folders to reflect the new domain.

The settings that should be changed in includes /configure.php are:

HTTP_SERVER - you should CHANGE this to your new domain name, e.g. http://newdomain.com:
define('HTTP_SERVER', 'http://newdomain.com');
HTTP_COOKIE_DOMAIN - again, this should be changed to reflect your new domain name:
define('HTTP_COOKIE_DOMAIN', 'newdomain.com');
If you are using SSL you should also modify:

HTTPS_SERVER - for example:

define('HTTPS_SERVER', 'https://newdomain.com');
HTTPS_COOKIE_DOMAIN - SET this to:
define('HTTPS_COOKIE_DOMAIN', 'newdomain.com');
In admin/includes/configure.php you should modify:
HTTP_SERVER - you should change this to your new domain name, e.g. http://newdomain.com:
define('HTTP_SERVER', 'http://newdomain.com');
HTTP_CATALOG_SERVER - again, this should be changed to your new domain name:
define('HTTP_CATALOG_SERVER', 'http://newdomain.com');
If you are using SSL, you should also change HTTPS_CATALOG_SERVER to:
define('HTTPS_CATALOG_SERVER', 'https://newdomain.com');

In order to configure osCommerce to work properly with another domain, you should modify the two configure.php files in includes/ and admin/includes/ folders to reflect the new domain.

The settings that should be changed in includes /configure.php are:

HTTP_SERVER - you should change this to your new domain name, e.g. http://newdomain.com:
define('HTTP_SERVER', 'http://newdomain.com');
HTTP_COOKIE_DOMAIN - again, this should be changed to reflect your new domain name:
define('HTTP_COOKIE_DOMAIN', 'newdomain.com');
If you are using SSL you should also modify:

HTTPS_SERVER - for example:

define('HTTPS_SERVER', 'https://newdomain.com');
HTTPS_COOKIE_DOMAIN - set this to:
define('HTTPS_COOKIE_DOMAIN', 'newdomain.com');
In admin/includes/configure.php you should modify:
HTTP_SERVER - you should change this to your new domain name, e.g. http://newdomain.com:
define('HTTP_SERVER', 'http://newdomain.com');
HTTP_CATALOG_SERVER - again, this should be changed to your new domain name:
define('HTTP_CATALOG_SERVER', 'http://newdomain.com');
If you are using SSL, you should also change HTTPS_CATALOG_SERVER to:
define('HTTPS_CATALOG_SERVER', 'https://newdomain.com');