It's clearly an electrical problem which, unfortunately, are never easy to diagnose. I am assuming there are crossed wires somewhere that is signaling the brake lights to stay on. Try taking your car to an Autozone or something similar to hook it up to a computer and see if it gives you a diagnostic code to resolve the problem.

i know what the problem is. i had the opposite problem but check the stop light switch. it's the switch that is attached to the brake pedal. adjust it so that the lights won't be on when your not using them :)