FSX Boeing C-97 Version 03

I had a problem wit the landing gear. It stays out and does not retract via the "G" command . By comparing with a previous version of the C-97 I modified the electrical part of the aircraft.cfg file. Now the landing gear retracts. The modification is :

[electrical]

// BusTypes: 0=MainBus, 1=AvionicsBus, 2=BatteryBus, 3=HotBatteryBus, 4-7=Generator/AlternatorBus(1-4)

// max_battery_voltage = 24

// generator_alternator_voltage = 28

// max_generator_alternator_amps = 100

engine_generator_map = 1,1,1,1

// electric_always_available = 0

;BusType, MaxAmpLoad, MinVoltage BusTypes:0=MainBus,1=AvionicsBus,2=BatteryBus,3=HotBatteryBus,4-7=Generator/AlternatorBus(1-4)

max_battery_voltage=24.0

generator_alternator_voltage=28.0

max_generator_amps=40.0

flap_motor=0, 5 , 0.0

gear_motor=0, 5 , 0.0

autopilot=0, 5 , 0.0

avionics_bus=0, 10, 0.0

avionics=1, 5 , 0.0

pitot_heat=0, 2 , 0.0

additional_system=0, 20, 0.0

marker_beacon=1, 2 , 0.0

gear_warning=0, 2 , 0.0

fuel_pump=0, 5 , 0.0

starter1=0, 20, 0.0

light_nav=0, 5 , 0.0

light_beacon=0, 5 , 0.0

light_landing=0, 5 , 0.0

light_taxi=0, 5 , 0.0

light_strobe=0, 5 , 0.0

light_panel=0, 5 , 0.0

electric_always_available=1