strange behaviour of log in session

[gengen]

site: www.seetang.com

testing account

usr name: p144328847@ntu.edu.sg

pwd: testing

 

steps to recreate the problem:

1. login using the testing account

2. click the "Top" link of the "Top >> Catalog"

3. click the "Catalog" link of the "Top >> Catalog", (or click the "test" catalog)

 

at step 3, I am shown as not logged in, the cart is empty

 

4. click the "Top" again

 

I am shown as logged in again,

 

then go back to step 3, i am shown as not logged in....

 

anyone can help here? thanks in advance

 

part of my configure.php is attached here, i think i did configure the SSL correctly

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define('HTTP_SERVER', 'http://www.seetang.com'); // eg, http://localhost - should not be empty for productive servers

define('HTTPS_SERVER', 'http://seetang.hostexcellence.com'); // eg, https://localhost - should not be empty for productive servers

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

define('HTTP_COOKIE_DOMAIN', 'www.seetang.com');

define('HTTPS_COOKIE_DOMAIN', '');

define('HTTP_COOKIE_PATH', '');

define('HTTPS_COOKIE_PATH', '');

define('DIR_WS_HTTP_CATALOG', '/catalog/');

define('DIR_WS_HTTPS_CATALOG', '/catalog/');

define('DIR_WS_IMAGES', 'images/');

define('DIR_WS_ICONS', DIR_WS_IMAGES . 'icons/');

define('DIR_WS_INCLUDES', 'includes/');

define('DIR_WS_BOXES', DIR_WS_INCLUDES . 'boxes/');