There are many possible reasons for a credit card not being accepted:
1. The card is expired.
2. You have reached or exceeded your credit limit.
3. You have exceeded your daily charge limit.
4. A computer at either end of the transaction is having technical problems.
If you have problems submitting your credit card payment you can contact Customer Service for help. When you contact Customer Service you may be asked for any error message numbers you received, as well as the reference number seen in the shopping cart.