It's probably the bug in P3d0Explorer, in the latest version the rsr2png is wrong, it reverses the alphachannel. Download the PLUGIN called rsr2png and put that in P3DO instead, and I think it will make them work :o)

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.