@cbelter – It’s difficult to say with any certainty since what is going wrong at this point since we cannot see your site’s backend. Looking at your Zen Cart configure.php file alone isn’t going to provide much information. We need to know if your site meets the pre-requisites to install this plugin. Based on the error you are getting, I strongly suspect that your Zen Cart and WordPress installations are not sharing the same database.
Doing an examination/analysis of your site’s back end is a bit beyond the scope of support for the free version of this plugin.
If you are unfamiliar with HOW to do this, you may need to hire someone to help you with this task. As part of supporting the free version of this plugin, we are certainly able and willing to provide as much basic instruction here in this forum for combining your databases if this is the issue. However, it may be difficult to execute the work required if you are not familiar with how to use your web-host’s cPanel (or Plesk) phpMyAdmin tool. Different hosts use different versions of phpMyAdmin so giving specific instruction for how to access your host’s phpMyAdmin Admin will be difficult. I added some basic instructions to this support thread which should work for most host’s.
Additional information here:
https://www.ads-software.com/support/topic/export-and-import-mysql-databases
https://www.ads-software.com/support/topic/before-you-post-a-question-read-this?replies=2#post-8255789
======================================================================
How do I know if Zen Cart and WordPress share the same database?
Look in your wp-config.php file for WordPress these defines:
define('DB_NAME', 'your_database'); // The name of the database
/** MySQL database username */
define('DB_USER', 'your_database_username'); // Your MySQL username
/** MySQL database password */
define('DB_PASSWORD', 'your_database_password'); // ...and password
If WordPress and Zen Cart are SHARING the same database, then the wp-config.php defines will MATCH these defines in Zen Cart’s configure.php file
define('DB_SERVER_USERNAME', 'your_database_username');
define('DB_SERVER_PASSWORD', 'your_database_password');
define('DB_DATABASE', 'your_database');
