Thanks for the replies.

Firstly, let me state that I do not imply any problem with the Neah texture. Since it works well for other people with the same software then this is clearly an issue to do with Poser Pro 2010 (on my computer) or the way it is set up.

Unfortunately this forum requires a URL address to show a picture so I can't show you the  shader network but it is complex.

I understand that not all features would be shown in preview mode but to show nothing but white because the shader node is complex seems daft and anyway, it works on other peoples systems.

My preview setup is exactly as shown above. I have also tried switching Enhance multilayer transparency on and off with no change.

I should note that the hair texture also does not show properly, but appears as outline.

My video card is Nvidea GeForce GTS 250; not the most powerful I'll admit, but it works well enough to show the texture correctly in poser 7!