When some aircraft are used with Airliner Pilot the tracker can still indicate that the aircraft is parked even when taxiing and after take-off.
Please download the tracker modification from the link below and then unzip the file.
Copy the APTracker.gau file into \Flight Simulator 9\Gauges\
Taxi mode will be activated as soon as parking brakes are released (regardless any engines running or not). This should work in any case.