ZBrushCentral

Disappear face after import..

I made this from Maya 2009 with simply extruding the face of cubics and planes.
And complete UV mapping.

After import to Zbrush, I found those wield face disappeared…
There is no trianglular face.

Can you give me some resolution??
Thanks in advance.

<img src=“http://www.zbrushcentral.com/pixo/atn.gif”>

Care to try and upload your image again?