Technical Stops - refueling

[clc000]

Not sure what I am doing wrong, but no matter what I try I cannot make a refueling stop.
I always get the same response that technical stops cannot be at teh worlds largest airports. I am trying all airports on the list and nothing works.
Please help!!!!

[01miki10]

Destination 1 is stopover.

You should first choose a small airport for refuel and when you select second destination, choose airport where you want to fly.