Whenever I've seen this problem, it's been because the path to the .obj file (as specified in the .cr2 file) for an object is incorrect. Why you would see it work with the Pro Pack, and not Poser 4.03, I don't know; I'd think you would see the problem in both cases, unless PPP parses filenames differently. Bottom line is, look at the appropriate .cr2 file. Hope this helps!