New Animations for existing character (from blender)

I have a character I’ve been using in my game. I’m realizing now that I need a few more animations. The character was made in blender, So I went back to that blender file, created the additional animations, and imported the character again. So now the character still has all its original animations and folder including the newly animated version. When I test things out but replacing a working button/play animation, with one of the new animations, nothing happens. How can I make this work???