Model has flat shading no matter what material i put on it...

[johhnymia]

so i brought this scene from into keyshot to test render and the trees and rocks are flat shaded. i thought it was the materials fault at first so i applied a new/same material on everything and the tree is black and i don't know how to fix it nor do i know what the problem is. any ideas?

[Greg_R]

I've noticed this problem after I have updated a model via live linking.  I think it usually happens when I've added another quilt/part in Creo, and then update it in Keyshot.  I can not apply a material directly to the object by either shift/clicking on it, or draging a material to it in the rendering window.  The only way I have found to get around it is to apply the material to the part in the scene window.

Windows 7
KeyShot 6.0.264
Creo 2.0 M140