My wife has a problem with her Galaxy. She can start the car as normal, however the knob on the gearstick will not go in when she tries to change to drive or reverse. When the engine is off she can push the gerastick knob in and move the gearstick back and forth no problems, when the engine is running gearstick knob wwill not budge and the gearstick will not move at all. Problem started this morning, got it in gear eventually. When she got where she was going and tried to change into reverse or drive it wouldn't go. She went into London, came back 3 hours later and its sill not working. Looking through the forums and certian things have been suggested auto-inhibitor, brake sensor. Any advice would be gratefully recieved.