There are several reasons that you could be getting an error message when trying to check out.
If the error message is happening in the payment screen, make sure that your credit card number is listed without any spaces or dashes. Double-check to make sure that the billing address matches the one your credit card company has on file.
In the event that you are getting a declined error message, contact your credit card company to see if they have fraud protection on that card. If they do, please let them know that you submitted an order online that is being processed in the state of Utah and that you want it to go through. Your credit card company can then adjust your profile so you can resubmit the order.
If your getting an error message in the shopping cart, then the brand may be updating their catalog. You can re-add the items to your shopping cart and proceed to checkout through the new catalog and your order will be submitted.