Brake Antilock Control Unit/module problems of the 2001 Land Rover Discovery Ii

I was driving my Land Rover Discovery Ii on a parking lot and was about to park, as I turned the wheel to get to the parking space I applied the brake, which became hard as a rock and the vehicle didn't slow down, I crashed into the vehicle that was parked on the other side of the parking space. Prior to the accident I had , what is know in Land Rover forum as the 3 amigo lights, which are the t/c, h/d and abs light that are on at the same time. The brakes completely failed, again the pedal was hard as a rock and couldn't be pushed down.