Paying dues with Disney Gift Card

[AdamsMum]

I'm trying to make a payment to my dues, with Disney Gift Card. I selected Pay All, New Card-entered my DGC and the EAN on the card. The card balance appears in the box correctly, but when I press submit payment I get a message saying :
"One or more items require your attention: Sorry your payment method was declined. Please try another form of payment or reduce your payment amount."

This DGC is in Canadian $, but I've never had a problem before when paying my annual dues.

 

[Mommb]

Seeing "reduce your payment amount" may indicate you have to say how much of the contract you are paying. Have you tried selecting "Pay by Contract" and then the amount on the gift card?