Hi Rita!
There are a few things that come to mind to make sure your little princess gets to dine like royalty on her birthday. First, continue calling (407) WDW-DINE, preferably early every morning, to see if anyone has cancelled their Advanced Dining Reservation. Consider making ADR's for the Princess Storybook Dining at
Akershus Royal Banquet Hall in Epcot's Norway Pavilion. This is another fabulous princess dining experience and the location has a fantastic atmosphere that your little girl will definitely enjoy.
If the date arrives and we're not lucky enough to get that reservation at CRT, don't be afraid to walk up to the counter at the entrance to see if anyone has cancelled at the last minute. You never know when a little pixie dust may come your way.
You might also want to substitute a princess dining experience with a reservation at the Bibbidi Bobbidi Boutique for a princess makeover, have dinner at another restaurant (a nice choice would be 1900 Park Fare) and have a special cake delivered to your table. To make reservations for the BBB, call (407) WDW-STYLE. To order a special custom made cake, call (407) 827-2253.
Hope this helps and have a magical vacation!