650 not showing

I have the 650/ 750 hardware stack from RealSimGear using Reality XP.   i have many planes both XP11 and XP12 and both the 650 and 750 populate to the correct RSG  device and work perfectly in every plane i have EXCEPT the Laminar Lancair Evolution ?   the 650 screen is blank both when first started and continuing to being placed in the correct monitor ??  750 works fine.   avionics switches are all ON.  any ideas how I can get it to work ?   The Lancair is such a cool plane and I would like to get the 650 working.......  HELP please   i updated to the current Reality XP installer and have the current RSG software.  still remains blank.....