Hi Dave, if you happen to have one of the "Space ball" models from 3DConnexion (which is an older version of their devices from a few years ago), then those are the ones that need 3DConnexion's newer generation driver layer installed for it to work with MoI.

That's the one attached to that previous message that Pilou posted:
http://moi3d.com/forum/messages.php?webtag=MOI&msg=816.5

If you have any of their newer generation devices from the past few years, like the Space Navigator or Space Explorer, then you don't need to do anything extra, the drivers that come with those ones are already using their newer interface model and will work directly with MoI.

- Michael