MY CUSTOMER CAN'T SUCCESSFULLY PAY USING HIS AMERICAN EXPRESS CARD. WHY?

My customer attempted to pay using his American Express card and the JOT FORM system replied:  THIS CARD CANT BE USED FOR THIS PAYMENT.  I use PayPal as the shopping cart/processor and I know they accept AMEX.

Please help! Thank you.

PayPal accepts all major credit cards from Visa, MasterCard, American Express and Discover.

If  the customer is getting "THIS CARD CANT BE USED FOR THIS PAYMENT". He should enter a different credit or debit card number."

The error message may show for one of the following reasons:

-The card is associated with a specific PayPal account, and you're not logging in with that particular account.

-The card was associated with a PayPal account that has since been closed.

-You've linked the card to a PayPal account, but have not yet confirmed it.

-You've exceeded your card limit with the PayPal system.

-Your email address is raising a red flag in PayPal's system.

-The browser is not accepting cookies. You should clear any existing cookies and try again.

If the problem persist, I would suggest you contacting Paypal support.