It's caused by the 3DS being a newer version that the one Poser knows. Someone with a program like MAX may be able to fix it. It's not uncommon, unfortunately.

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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.