Hello all,
I've searched the forums and haven't found exactly the issue that I'm having so now I'm posting a question, in spite of my best efforts. =)

The Issue
On the website http://shop.dearmrfantazy.com when you attempt to login you are taken to a screen, which again, asks you to login. It's an endless loop, seemingly. Then, if you click on the one product that is available and add it to your cart, that works fine. However, when you click on 'proceed to checkout' you get a message stating 'Ooops, your session has expired.' You are then prompted to login again and the loop continues.

To Replicate Go to the above referenced link and attempt to purchase that item.

What I Have Tried
I have ensured that my session write directory is set to 777.
I have ensured that the 'session.referer_check =' Is disabled
I have checked to see that i'm not using SSL. That value is set to false in my config.php file...
I'm at a bit of a loss as to what the issue is.

Additional Information
My Config.php file
##############################____
<?php
/**
*
* @package Configuration Settings
* @copyright Copyright 2003-2006 Zen Cart Development Team
* @copyright Portions Copyright 2003 osCommerce
* @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0
*/


// 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://shop.dearmrfantazy.com');
define('HTTPS_SERVER', 'https://shop.dearmrfantazy.com');

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

// 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', '/');

define('DIR_WS_IMAGES', 'images/');
define('DIR_WS_INCLUDES', 'includes/');
define('DIR_WS_FUNCTIONS', DIR_WS_INCLUDES . 'functions/');
define('DIR_WS_CLASSES', DIR_WS_INCLUDES . 'classes/');
define('DIR_WS_MODULES', DIR_WS_INCLUDES . 'modules/');
define('DIR_WS_LANGUAGES', DIR_WS_INCLUDES . 'languages/');
define('DIR_WS_DOWNLOAD_PUBLIC', DIR_WS_CATALOG . 'pub/');
define('DIR_WS_TEMPLATES', DIR_WS_INCLUDES . 'templates/');

define('DIR_WS_PHPBB', '/');

// * DIR_FS_* = Filesystem directories (local/physical)
//the following path is a COMPLETE path to your Zen Cart files. eg: /var/www/vhost/accountname/public_html/store/
define('DIR_FS_CATALOG', '/home/mrfantaz/shop.dearmrfantazy.com/');

define('DIR_FS_DOWNLOAD', DIR_FS_CATALOG . 'download/');
define('DIR_FS_DOWNLOAD_PUBLIC', DIR_FS_CATALOG . 'pub/');
define('DIR_WS_UPLOADS', DIR_WS_IMAGES . 'uploads/');
define('DIR_FS_UPLOADS', DIR_FS_CATALOG . DIR_WS_UPLOADS);
define('DIR_FS_EMAIL_TEMPLATES', DIR_FS_CATALOG . 'email/');

// define our database connection
define('DB_TYPE', 'mysql');
define('DB_PREFIX', 'dmf_');
define('DB_SERVER', 'mysql.dearmrfantazy.com'); // eg, localhost - should not be empty
define('DB_SERVER_USERNAME', '*********');
define('DB_SERVER_PASSWORD', '*********');
define('DB_DATABASE', 'dmf');
define('USE_PCONNECT', 'false'); // use persistent connections?
define('STORE_SESSIONS', 'db'); // leave empty '' for default handler or set to 'db'

// The next 2 "defines" are for SQL cache support.
// For SQL_CACHE_METHOD, you can select from: none, database, or file
// If you choose "file", then you need to set the DIR_FS_SQL_CACHE to a directory where your apache
// or webserver user has write privileges (chmod 666 or 777). We recommend using the "cache" folder inside the Zen Cart folder
// ie: /path/to/your/webspace/public_html/zen/cache -- leave no trailing slash
define('SQL_CACHE_METHOD', 'file');
define('DIR_FS_SQL_CACHE', '/home/mrfantaz/shop.dearmrfantazy.com/cache');

?>
##################################################__
Hopefully someone can guide me in the right direction. If this answer is in another post, I apologize for not being as diligent a forum searcher as I ought to be. Again, any assistance rendered on my behalf is much appreciated.