The installation process is clumsy. Only through initial troubleshooting steps was the verification process revealed. I have been able to send only one test payment in the 3 days I've had this installed. I have had multiple back and forth email conversions with support and they are sad. My support case was handed off to another tech and I was told today that they can see why it's not working but for security reasons they can't tell me. Their solution is keep trying or use PayPal. Awesome! :-(