Problems using Kerberos telnet

[Someone]

Hello, I am using MIT kerberos v1.2.3 on a Linux machine, I have 
activated the kerberized telnet daemon in inetd.conf like that:

telnet  stream  tcp     nowait  root    /usr/sbin/tcpd 
/usr/local/sbin/telnetd -a valid


And then I am using the kerberized telnet client to login to my host (to 
test) but I cannot, see the following output:

 > telnet localhost
Trying 127.0.0.1...
Connected to localhost (127.0.0.1).
Escape character is '^]'.
telnetd: No authentication provided.
Connection closed by foreign host.

Do I need to do anything special ? I have received a ticket from my KDC 
and that host has a keytab file.


Any help would be appreciated, thanks