I'm trying to remember, but I think you need at least service release 2 for it to work in P7.  I also needed to download the latest version of the Space Navigator drivers to get it to work.  Beyond that, I don't recall having to do anything fancy to make it work with P7.

If you've done those things, go to the ContentParadise forum to see if somebody can help since that's the official SmithMicro Poser forum.

It's been a while since I installed the Navigator, so it's hard to remember the process.

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon