Converting back for a campaign

[SaS TrooP]

I tried to assign this scenario for a user campaign, however my core force seems to be ignored and I am asked for Canadians instead (default settings). How should I then "move" my core force into the campaign so I can carry on with it? The game sees the core force (as other units are listed as aux), but seems to be ignoring it in user campaign output.

I am sorry for that, I havent been doing it previously.