The texture map is clearly only assigned to a selected numbers of polys. How to solve this in C4D, tell you I could. But Poser not yet. I would remove the hair altogether, try another one of Koz' wigs and if that works, I'd try this one again at standard settings. The mat file may be corrupt, or simply badly loaded. Just guesses.

I have tried prudent planning long enough. From now I'll be mad. (Rumi)