I went to my corrado and pressed the thob button and the alarm beeped once as normall but the locks did not open, except the boot. So in I climbed unlocked the doors and tried to start the car. Turned the key and click, but nothing else, then the alarm goes of, cant turn it off then it stops, so I bumped the car to start it which it did but the central locking still does not work, everything else does any ideas please.