Hi Jehu,
Thanks for your quick response. I can't test your suggestions before wednesday, but these options were unticked. And I tested it with one of these ticked.
Like I said it works with RealPlayer, but not with Windows Media Player. I forgot to tell I have a Workgroup MSE within a current NT domain, without a network connection (a pure server). In the answer I was reffering to (which actually works) the solution was to use a StreamBase with a static IP.
Frank.