Revan the Conqueror

Hi everyone! This is my first time playing through with the restored content mod, (was following the team gizka project for years before they decided to throw in the towel), and I have to say that I am very impressed with what has been accomplished. I'm not sure if this has been an issue before, I couldn't find anything about it, but when I try to teach Atton some new forms and training etc. he replies, "I can't use that." I'm not sure if I'm doing something wrong here but any help would be appreciated, thanks!