Oh well. There I was opening Vue for the very first time. Played with the intro tut, lovely! Then I fetch a Poser scene and want to export it. Vue asks for the path to my copy of Poser, and I autoamically direct it to my P5 folder (not my P4) not thinking it will make any difference. And boom! Vue tells me my Poser serial number is invalid..... and now I've had it. I try to open Poser PZ3's and it immediately says my Poser ser. no. is invalid, gives me no chance to redirect it to my P4 instead, which it might like better. What on earth do I do now? And both my P4 and P5 are 100% guaranteed OK, no funny stuff. Purchased and valid. :[ Fishy frustrated