I WAS APPROACHING A TRAFFIC LIGHT AT APROX. 25 MPH. WHEN I APPLIED THE BRAKES, THE CAR DID NOT SLOW DOWN. I AGAIN APPLIED THE BRAKES AND THERE WAS A LOUD SCREECHING NOISE AS IF I HAD SLAMMED ON THE BRAKES..WHICH I HAD NOT DONE. THE CAR CONTINUED TO ROLL FORWARD EVEN THOUGH I HAD THE BRAKE PEDAL FULLY ENGAGED.*AK