Zencart site cannot connect to database, look into fix

I have a website that is currently down, due to database connection errors. The server admins blame my scripts with Zencart, which were fine 1 week ago and have been fine for a couple of years. All of a sudden this has happened and they can't fix it. I have a blog on the same server, connecting to another database which is fine. When I try to access home page, I get this Zencart error: Sorry! There seems to be a problem connecting to our database. Please give us a few minutes to remedy the problem. Thank you. When I try to access Zencart admin, I get this: 0 DB_ERROR_NOT_CONNECTED in: [select * from project_version WHERE project_version_key = 'Zen-Cart Database' ] If you were entering information, press the BACK button in your browser and re-check the information you had entered to be sure you left no blank fields. I can access the server control panel just fine. From the [login to view URL] code: * @package general * @copyright Copyright 2003-2005 Zen Cart Development Team * @copyright Portions Copyright 2003 osCommerce * @license [login to view URL] GNU Public License V2.0 * @version $Id: [login to view URL] 2942 2006-02-02 04:41:23Z drbyte $