Hello there, daddyb60.
There are a few possible reasons why a credit card payment is declined. You can find the information here: Why is my customer's card declined?.
I'd also recommend reaching out to our Merchant Service Team, so we can check your account.
Here's a link where you can get our contact information: Contact Payments Support.
Please feel free to add a reply on this thread if you have any additional questions or concerns. Take care and stay safe.