My skeltalmesh Scattered when I Importing

Hi. I’m student from Korea Republic.

I made characters with several parts in 3dsMAX 2015

And each of these parts skinned to Biped.

When beginning of my project, export and import works fine.

But now When I try import. It scattered.

Every single parts becomes each of asset.

I think I changed options by mistake or something.

Because FBX file that I export a Month ago, imported fine. I tried 10minuts ago.

This is export options I tried last time.

Would you check it for me?

I uinstalled 3DsMAX, and re-installed. simply reset the options and the roblem solved.