[cvsnt] cvs login aborted] on Solaris 10

[Faraone, Dominic]

installed cvsnt on a new Solaris 10 host and enabled cvspserver as a service.
But am having problems with login. when using 
cvs -d :pserver:<userid>@<hostname>:/cvs login 
receive the following 
cvs [login aborted]: unrecognized auth response from sbcsapp1: Unknown
command: `cvsnt'
when I telnet to port 2401 I get 
# telnet sbcsapp1 2401
Trying 10.104.185.32...
Connected to sbcsapp1.
Escape character is '^]'.
Unknown command: `cvsnt'
 
CVS commands are:
        add          Add a new file/directory to the repository
followed by the list of commands 
 
I think I've missed something simple, anyone seen this before?
 
Thanks,
D