Mesh location after upload

[ayamashi]

I tried making simple item for myself but run into some problem.

Is there a reason why my piece moves correctly with the arm after applying weights in Blender, but after uploading it clips through my avatar arm?

The shape I have in Blender is the same as my avatar imported through xml with Avastar.

Is it rigging error or export settings or Avastar settings?

I am kind of new to avastar and first time seeing this, never had a problem like this on previous creations.

Thanks.