It sounds like a problem with the textures themselves, did you try importing a different poser figure that doesn't have special textures from someone else? It shouldn't have any problem importing jpg's at all. For Vue 4 make sure you have installed all the latest updates, Vue 4 didn't originally support Poser 5 (as it hadn't been released yet) but later patches made Vue 4 compatible with Poser 5 (though not with the Dynamic Hair and Cloth which requires the Mover 5 add-on to import). Hope this helps.