Here are a few suggestions:
1. Cybersource.php file
Make sure file “cybersource.php” is located in the root directory of your ZC store on the host server.
2. CyberSource test server URL visible
If you can see the CyberSource test server URL on the checkout confirmation page, it means that your CyberSource account is probably configured to use the wrong connection method (Hosted Order Page instead of the Silent Order POST).
Please verify your setting using the Implementation Guidelines:
http://www.zen-cart.com/index.php?ma...roducts_id=665
3. Receipt Response URL
Verify that the “Receipt response URL” used by CyberSource to return transaction results is properly specified. Please see Paragraph 7 (CyberSource Business Center Settings) of Implementation Guidelines:
Go to CyberSource Business Center >> Test Business Center >> enter Username & Password and click Login >> Left vertical bar menu >> Tools & Settings >> Hosted Order Page >> Settings;
The “receipt response URL” should be your ZC store URL.
Please also verify the correctness of the “Decline Response URL” further down the page.
deBeaujeu