When I went to Disney World in May Disney's Website showed u can make ADR's for Beaches and Cream but when I called they said they do not take reservations and couldn't understand why their site said that they did.
Be prepared to wait too. We were there on 12/6, checked in at 9pm for a 45 minute wait which became an hour wait because of a giant group ordering food, then dessert, and then just sitting around talking.