Ok Let me first say that I am not an Offline Mission developer.
I say this to let you know that I can't be of help with your mission developing.
That said, I downloaded your transport mission.
Although you now have the Esnips posting, Forum posting, and download link embedding down pat, your mission had numerous problems.
First of all it was placed on Esnips as a .mis file rather than a .res file.
In order to run the mission I had to Open it in the Mission Editor an tell it to Build a Res Library.
That done I could now choose and fly the mission from the Practice Mission list.
When I tried to take off in any of the C-47s they would not taxi or take off. They only became flyable when they met, in the air, a few minutes into the flight.
At that point I didn't try to fly anything else.
You might try to get some advice from a Mission developer.
Herder