I am trying to join a W2K computer to an existing domain that I have set up in my house. I’m taking the Microsoft classes for MCSE and I have followed all of the steps in the W2K Server book. This comp is presently a member of the workgroup that Ioriginally had set up. Last evening I promoted my other computer to a D.C. and DNS server and set up the correct IP address for both computers. When I click on the radio button for “Domain” and add the name of my domain and enter the administrator name and password, I get an error stating that “The interface is unknown”. That’s it, no other error messagess, but it will not let that comp join the domain. Both comps (the DC and the other one) are running the 120 day trial version of W2K serversoftware. Any ideas??????