Flightplan Problem
I input a flightplan that appears to be accurate - for example the same flightplan input successfully into other aircraft. My problem is that the aircraft follows the flightplan for a leg or two then stops. Or it doesn't follow the plan from takeff at all. I have turned on the ARCDU and activated the transponder, switched on ap after 1000 ft., pressed nav etc. The FMS always shows M in the upper right corner, instead of up and down arrows as shown the the Sample Flight pictures. I am obviously missing step or two.
Help would be great.
Martin