Sit down with her and have a serious talk(although I suppose you've done this already). Explain to her that it's part of her obligations as your woman to stand behind you, trust and support you in everything positive you want to do(don't speak in this military style I used, but that should be the deeper meaning of your talk). Let her explain her concerns, why she is not doing the above. If she says something that make sense, take it into account(and let her know you did). But if it's only a character/ego problem and plain negativity, finish with her and try someone else. Life is too short to share it with negative people. Your johnson already agrees as you wrote.