Are you guys using P6?

Do you have "Use External Morphtargets" turned on? (they're on by default)

Have you moved the PZ3? or deleted/moved the corresponding .PMD file? That is likely the cause of your problems. The solution is to turn External Morphtargets OFF in the settings. They're likely to mess up a lot of other things anyway.

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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.