I bought my 02 156 Alfa with one of the black keys not working. So i took it apart and found one of the microswitchs had become detached from the PCB. Had it expertly soldered back in position and reassembled key. Now the key unlocks the doors, starts the car, but does not work remotely, although the little red light on the fob flashes. Anybody know what i need to do now? Thanks.