I am using the sandbox url for accepting test payment through paypal.
When a user clicks a button he is redirected to paypal sandbox site. On the paypal sandbox site the user is presented with an option to pay using credit card. However when I try test credit card 4111-1111-1111-1111 it gives me the following error "The card you entered cannot be used for this payment. Please enter a different debit or credit card number."
I am not sure what am I missing?