Arducopter without usingmavproxy

hello, i want to ask related with Arducopter (SITL) RC Input. Before i using mavproxy and send RC_input from my GCS by using UDP:5501 . it was working well.
But when i tried to run ArduCopter.exe file directly on cygwin (using ./arducopter -O-34.98106,117.85201,40,0. --model quad) and send RC Input (UDP:5501) from my GCS) but it not working and affecting at all.
So, basically we can’t run like that without mavproxy?
i am very new in ardupilot so dun understand well about mavproxy and ardupilot interaction.