Hello everybody,
I’m new in Max 2011.
I must doing an animation with a mesh already finished.
I make the rigging and the skinning with a biped.
Every tests I’ve made was ok, there are no mesh problems (I conect the mesh with the pelvis)
I begin my animation, I hide the mesh for an easiest way, and everything is alright. (it’s on a different layer)
But when I unhide the mesh, He do the right movements as the pibed do but it get unattach to the biped and make a rotation on itself…
I verify every thing with the attachement (physique morpher)and nothing change (the mesh isn’t deform)
I’m looking for a rescuer! 
Thanks!!!