Haha, sorry to ask but, have you ever used Cal3d?
That method is Irrlicht's native, right? For b3d or X models, NOT cal3d models.
Cal3d is totally different... http://gna.org/projects/cal3d/
The code for using it, is something like this:
Cal3d Is Character Animation Library (CAL), so it is very different than "animateJoints"... Unless you implemented (overrride) the "animateJoints" method or something like that, than I would like to see the CAL3D code for that hehe.