I put all the textures into the same folder (I assume you meant folder, not file), and the problem persists.

In UVMapper pro, the materials show on the exported object.

If I re-import the object file into Poser, the Mat zones are gone.

The attached image illustrates what happens. The object on the left was exported and re-imported into Poser.

 

Poser 11 Pro, Windows 10

Auxiliary Apps: Blender 2.79, Vue Complete 2016, Genetica 4 Pro, Gliftex 11 Pro, CorelDraw Suite X6, Comic Life 2, Project Dogwaffle Howler 8, Stitch Witch