Acccording to Autodesk, the problem is; It's not a Windows server.
Same type of responce sometimes found when talking to Adobe..

We run NW 6.5/Sp7. No filecaching, no oplocks, NSS volumes.
And,, the problem exists, it does not work on NW.

Problem off course beeing, some users find this function and are eager
to implement. Any ideas on how / were to try to pursue this for a fix?