Landing gear drag..

I've just noticed that several add-on planes (including my own) don't experience any drag when the gear are lowered...
I opend the air files with AirEd and found the entry for landing gear drag coefficient, but changing that number has no effect.. either way..
Anybody else experience this.. Or know the fix ?
I opend the air files with AirEd and found the entry for landing gear drag coefficient, but changing that number has no effect.. either way..
Anybody else experience this.. Or know the fix ?