I agree with the previous post. If you're flexible with dates, try one day before or after. Normally if a regular room rate is sold out, so is the AAA rate. And try 45 days out as well as 30 days out too...I can't count how many times I've canceled reservations for clients then too...
Also if you're currently on a package with Disney, you won't get charged change fee's if your reservation increases in price, so consider dropping a days worth of tickets, then adding the day back on a few days before you go to see if a room opens up then too...
I hope this helps!