Thanks Dr. Byte. I JUST figured this out about 50 minutes ago. I remembered to disable the mod then re-input all of the data so it would take this update as well. Thanks for replying to this though. I used Araxis and found the changes from 138a to 139h on this file authorize_aim.php file within includes/modules/payments/ Have told the client the issue on PCI and compliance and he is aware... Thanks! -Tom