^ This is a bit too vague to diagnose the problem, but I'm going to assume you haven't ran the car and maybe just turned on the accessories to find the red BRAKE light staring at you, in addition to the DIC reading "Anti-Lock Disabled" (IIRC).
BEFORE YOU DRIVE THE CAR:
1) Make sure the parking brake is released - the release button in located underneath the dashboard on the driver's side and can be tough to find if you don't know where.
2) Start the car, and give it about a minute to warm up. If the car has been sitting for a while, this should charge the accumulator, which is necessary to run the brakes. After about 30 seconds, the light should go off and "Anti-Lock OK" should display on the DIC.
If this doesn't fix the problem,
DO NOT DRIVE THE CAR UNTIL IT IS FIXED!!!!! It is only a matter of time until the brakes totally fail. There are a few sites which offer parts and services regarding the Allante's Bosch III brake system.