problem importing animations from 3DS Max

SORRY, THIS SHOULD HAVE BEEN POSTED IN SUPPORT/ANIMATIONS

Context:
1- Building a game using Blender Game Engine
2- Modelers and animators work with 3DS Max

Problem : animations work, kind of… but badly

Pipeline:
1- Model , armature, and animation done in 3DS Max
2a- Scene exported in FBX format
2b- Mesh exported in obj format
3- Opened in Motion Builder to re-export armature and animation in bvh format
4- import bvh in Blender
5- import obj in Blender
6- name bones, and mesh groups to match
7- parent mesh to armature using named groups

Animation is there , but armature in edit mode is completly off Pose mode, so the mesh breaks and spreads in unearthly fashion
I’m rather a newcomer in 3D (mostly a programmer) : trying to define a workable pipeline for the project

Looking for help on what to do to make the armature and mesh synchronize correctly
Thanks in advance!
my blend file: /edit: REMOVED)