Sorry for the really newbie question...but how do I apply different hair colors to prop hair?

Specifically, I'm using Poser 7 and Aether Hair. I want the hair to be black, so I try double clicking on the MAT Aether black thumb and nothing changes. It renders in all white.

Yes, the hair is selected and parented to head.

I've looked into the materials room but the hair has many, many different material segments. I can't believe I have to apply the color to every segement. Or do I?

What am I missing?

Thanks.