that what happen ,
i land my plane for resupply and repair , first i ask ground crew to connect air supply and ground power they say it connected ,
i turn off the engine and power and electric is connected and everything is going normal ,
then i ask for repair but once the plane is repaired i louse the ground power and air supply ,
i ask ground crew to connect air supply and ground power again then ground crew say it connected but im not getting any power or air supply anymore and dont matter how many time i try so now im stuck unable to start the plane again .
I found that if I just turn of my engine I wont be able to connect to air supply also