Huge problem with character animations.

I have a .blend of an animated character someone else made for me. The animations are in the dopesheet, and are separated into different actions. I drop the .blend into my Unity project, but then I can't access any of the animations the way I should. I've tried changing how the animations are stored, I disabled split animations, a lot of things. There's no way I can access any of the animations. All I can get it to do is get stuck on the "idle" animation, which doesn't even loop correctly. Help.