Are you talking about DAZ morphs or morphs that comes from elsewhere?

Check the file extensions. Poser 8 doesn't like extensions that are in caps. So PZ2 won't work while pz2 will.

It is one of the things that are likely fixed in the upcoming SR1 - but until then, just change them with any renaming software (RenameIt is great, and free ;) )

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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.