Thanks, for the reply, Umberto.
Okay, I have the same type of Refueling Truck come to my Majestic Dash Q8-400, and it does the same pirouette under the right wing, then the fuel quantity request screen shows up, I select say 80%, but whereas in your video, now the two men get out of their Refuel Truck to carry out the refueling hose connections, etc, in my case, that Refuel Truck just comes under the wing, the same fuel load menu shows up, I select, and then without any men getting out, etc, it just waltzes away, and all this despite selecting Progressive Refueling in the Settings. It does so for the PMDG, the FSL, the CS aircraft, except this particular aircraft.
So, where am I going wrong?