I have setup a coda server and ma having problems authenticating as
codaadmin.

During vice-setup I gave the UID of 500 and username of my account (tewari)
as the Coda:Administrator.

After the install when I try to add a new user as 

/usr/sbin/au -h codasrv_vijay nu (I am logged in as tewari on the machine
codasrv_vijay, I even tried this logged in as root) I get 

RPC2_Bind() --> RPC2_NOAUTHENTICATED (F)

Regards
Vijay