I had that prob in Poser Pro. It was the file name. If the file nmaes are too long, the files won't show. But if the Pz2 is there okay, it might be a size issue. If they somehow got sized over 91X91 pixels, they won't show.

Let me introduce you to my multiple personalities. :)
     BluEcho...Faery_Light...Faery_Souls.