3ds max skin and apply skinned cloth in Unity, all vertex rotated 90 degrees

Hello, I have tried 4 hours still no idea what’s going on, but seems no one on the internet discuss this …

I made a very simple box mesh with bone in 3ds max 2011 like this,
skin modifier was added:

default box, add bone and add skin modifier, nothing else touched, the skin is working well.
And then I exported to fbx by selected the bones and the box, and clicked “exported selected”:

selected smoothing group, no animation / camera / lights / embed media,
auto unit, Y-up, fbx 2013 binary
the plugin is 2013.3 (197930), which is the latest

Back in Unity 4.3.3, I imported the box.fbx by dragging it directly into the assets folder,
added it to the scene, the model’s roation is correct as I selected Y-up when export to fbx
I selected the “Box001” game object under the hierachy,
and added “skinned cloth” component
and all the vertex are rotated…

does anyone tried skinned cloth with the fbx exported in 3ds max? :sad:

i have the same issue