If you are configuring the dcom configurations, you are running HFSS 11 or earlier. Contact your application engineer and they can send you a powerpoint that walks you through the setup of the OS. If you are upgraded to HFSS12.0 or later, RSM automatically sets up the OS settings quite nicely. If you have a failure to run DSO in HFSS12 or later, be sure that you run "register RSM" under the Ansoft programs. If problems persist, contact your application engineer as RSM is actually very stable.