Joining Panther servers to Kerberos realm on OD Master

javascript:emoticon(':cry:') Hi, I'm trying to set up multiple Xserves (all running Panther Server) to use one of them as an Open Directory Master for both centralized user administration AND single sign-on. So far, I've gotten Directory Services on all member servers configured correctly to where I can manage permissions/users on all Xserves from a single source (the Open Directory master). The problem is single sign-on. I haven't been able to join any of the member servers to the Kerberos realm on the OD Master. I don't know if I am setting up the computer accounts incorrectly in the OD Master (in Workgroup Manager, computer lists) or what. Can anybody help?