I recall reading that with the changes made recently to the system (regarding DDP having to be prepaid, etc), that on order to be able to make a DDP ADR for those "signature" locations (2 credits or dinner shows) you will have to have the DDP in place already prior to attempting to make the ADR. Without the DDP you pay via cc at the time of reservation. So if you don't yet have that component added to your reservation, you'd need to do that. But best to call MS or the Dining line as the PP's have suggested.