Why my 2D Ragdoll with Hinge Joints is twitching in itself?

I’m trying to make a ragdoll physics 2d game, and i make a sticky figure to be the character, but after I set the character, with the sprites of each of the members of his body, I put them in the hierarchy (pareting) and turn the hinge joints into place, the character twists and sometimes all parts come together. As the image below:
(This are the hinge joints)
54530-snap-2015-09-18-at-001234.png
(This is my character after i hit play)
54532-snap-2015-09-18-at-001142.png

What i’m doing it wrong? It’s supposed to be that way? because it seems that something is wrong.

keep all connected bodyparts hierarchically parallel in one container gameobject, otherwise they also adapt parent rotation.

does that help?