The most common reason for order form failure is a credit card either being entered incorrectly or being declined. Other common reasons why your order will not submit is because you did not provide all the information required by the form. The form will display red dots under the fields that do not have correct or complete information. Simply navigate back to the question that needs to be fixed.
For credit card failures, the reason for the card decline will be on the credit card information entry page. Frequently, this error message is not very helpful, depending on your bank, and you will need to call your credit card's customer support number to complete the transaction.
While you are troubleshooting your order, you can always save your incomplete order form to finish it later by following these instructions.