Hiya Jinx...did you import the tree pp2 from Poser? It looks to me like you're trying to just import the object (.obj), which comes in without textures. The pp2 has the textures mapped onto it. I just downloaded one of the trees, will go check it out for you and see what I can come up with, as I don't remember if you have Poser or not.

Sgiathalaich