Can Resistance soldier skills work on regular soldiers?

[SteelRook]

I've been messing around with making base-game class duplicates of the Resistance Hero classes (Reapers, Skirmishers, Templars), and it's not really working. I'm successfully able to handle ability distribution, armour-and-weapon assignment and so on, but I can't get the skills unique to the new classes to work on the old ones.

 

http://steamcommunity.com/sharedfiles/filedetails/?id=1129907423

 

The above is my attempt to use the Skirmisher ability Justice on a non-skirmisher class, and it just doesn't work. I know the character rig can handle the animation because Skirmishers use the vanilla character rig, so why can't it animate Justice? If I can create a base-game class and give it Psi Operative Mindspin, then why can't I do the same with Justice?