Rigidbody+collider conflicts with ragdoll structure

Hello, the commUnity! :) Currently I'm working on a character controller system, based on using Mecanim (animations move the character). So I've watched this [tutorial][1] and made practically the same. In particular, I've added a rigidbody component and a capsule collider to the character. Everything worked fine, until I've decided to use a ragdoll instead of a death animation: the character now slides slightly in the forward direction. In fact, it is standing on the horizontal plane, so the gravity force doesn't seem to be able to move the character. [1]: http://www.youtube.com/watch?v=Xx21y9eJq1U