The fuel truck is correctly appearing on the right side, because if it was on the left (that was a problem, instead), it would have conflicted with the passenger stairs so, we fixed it and placed it on the right.
The issue is not the fuel position on the right, which is correct, but the fact it doesn't depart, and this is likely due to having followed the wrong procedure, most likely you must have started the refueling on the airplane at the wrong time.
Please read the manual carefully, the explanation of how the refueling system is supposed to be used on a 3rd party airplane with a custom fuel system, and how the procedure changes depending if it has a progressive refuel simulation or not. Since the Aerosoft A320 can refuel both progressively or instantly, you must use GSX accordingly to the method you used.