Slitherine

I have a problem in multiplayer campaign design.

I did the campaign, I see my campaign in the multiplayer menu and her list of scenarios when I do a "my challenge", all right... but when I choose a scenario in the list and I want to play the first turn... ¡boom! it shows the defeat screen and the battle is over. The same in all the scenarios of my campaign.
What have I forgotten in the editor?

Several possibilities:
a) You have mispelled the name of your scenario in the Campaign.txt file.
b) You have put all the troops of both sides on Side 1.

Probably other things possible too. (a) is the most likely however - I keep doing that myself.

It was a)
Now the scenario works... thanks!