I have a Minivan reserved with Alamo at the Disney Car Care Center in March. I used the code available to AP holders and got a price of $52.00 for a one day rental. Alamo now has a code on their web site that is good for Minivans ($38.99 a day) and Compact Cars ($29.99 a day) through 5/25/05. When I try to apply the code to my existing reservation, the price actually goes up. How do I apply the Alamo code to my online reservation?