Joints not working/no gravity? with Animator Component

I am trying to get my character's hair tail to swing via joints on bones, but during runtime it doesn't animate.
If I turn the animator component off then the hair swings freely and works as intended.

I'm not sure if the component is affecting the gravity or just locking up the bones.

I think it used to work on the version before 4.3.4 so maybe they've changed something in this version?

Any ideas on how to fix this?

 

Is there keyframe in the animation affecting the ponytail bone? If that's true, then it won't swing.

the Animation update is after Physics update and will overwrite the physics calculation result.

 

No, all the animations that have been exported didn't have keyframes on the physic bones.
It used to work before, I don't know why it doesn't now.

 

I've updated to 4.5, still no changes.
Even if I leave the default animation blank, the hair bones still stay fixed.
In the animator component, if I set the controller to none it works. So I'm not really sure where to troubleshoot next.

 

So, for your animations, what if you make a custom mask that masks out your physics bone/s transforms?

 

It's all fine now. I made a new controller and redid everything and now it works.
There must of been something wrong in the old controller.
Thanks for replying everyone.