I just installed Zen Cart 1.3.6 at 1and1. I have a shared SSL but somehow it's not working.
here is my site
http://store.ultradyna.com
If you click the user login, then it redirect you to
https://ssl.perfora.net/store.ultrad...ain_page=login

I tried to search here and I couldn't figure out the reason. Anyway, here is the includes/configure.php of my site:

Code:
// Define the webserver and path parameters
  // HTTP_SERVER is your Main webserver: eg, http://www.yourdomain.com
  // HTTPS_SERVER is your Secure webserver: eg, https://www.yourdomain.com
  define('HTTP_SERVER', 'http://store.ultradyna.com');
  define('HTTPS_SERVER', 'https://ssl.perfora.net/store.ultradyna.com');

  // Use secure webserver for checkout procedure?
  define('ENABLE_SSL', 'true');

// NOTE: be sure to leave the trailing '/' at the end of these lines if you make changes!
// * DIR_WS_* = Webserver directories (virtual/URL)
  // these paths are relative to top of your webspace ... (ie: under the public_html or httpdocs folder)
  define('DIR_WS_CATALOG', '/');
  define('DIR_WS_HTTPS_CATALOG', 'https://store.ultradyna.com/');