When trying to render an assembly, I am running into a problem for which I can't seem to find a solution:

One partially transparent part is being rendered correctly, while another that should have the same appearance (after 'copying' and 'pasting' it) is not.  It ends up appearing more reflective even if a light is directly illuminating it.  No setting I tinker with seems to help make the problematic part transparent.  Rendering the parts individually (not in the assembly) leads to the same result.  Remaking the problematic part from scratch doesn't help.

Attached are the parts that I'm working with:

correctly rendered = OuterPlate.SLDPRT

problematic = ReelWall.SLDPRT

This is being attempted in SolidWorks 2014 x64 with PhotoView 360 enabled.

Any suggestions, comments, or requests for additional information are welcome!  Thanks very much for your help!