The airplane has two flap positions, but when I set up FDC with 2 flap positions, I get an error message saying the panel I am using has 2 flap positions, BUT, the airplane I am trying to use has 2 flap positions and can

If the number of flap positions match, I should be able to use the airplane, correct?
Is there something about the Concorde SSTSIM that makes it not work with FDC?
Thanks
coldhoist