It worked with smooth, but that's not the big problem. It is easy to fix in 3D max. Anyway thanks for helping.
The big problem is the normal map rendering. I'm getting much troubles rendering it in 3D Max, and I fixed the UVW and the configuration in GUVTiles in Zbrush (I do not like pelt mapping for this model).
Edit: I made a color test with colorize tool. It's near to be the Scrab with some more work:
Well it has too much bright because the Zbrush material. I'm watching for materials, and I'm colorizing it with some browns.