The above looks like the hair node with default blonde texture to me. Have you run the sim more than once? You may be texturing a previous hair lodged in Poser's ram stack somewhere. Stranger things have happened.

I've used the same setup on dynamic hair for more Poser versions than I can remember. The hair should render in either Firefly or Superfly render engines with the setup I've shown. May be a SR issue but I can't remember this shader not ever working.

Like I mentioned above; maybe the friendly staff that are supposed to be monitoring this thread and bestowing wisdom will lay a little on us over this. Let me think a bit and try a different approach. Maybe I can figure out your problem.