Dynamic hair doesn't export. There's a new plugin (from Greeenbriar iirc) that allows you to export dynaimd hair and clothes to 3DStudio Max, and I'm not sure if there's one that works for Vue too, but in general terms, you can't export dynamic hair.

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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.