"talk" under Ultrix 3.1

[Tommy Hsieh]

I have a question about talk program of DECStation 3100 running Ultrix 3.1. 
When I tried to used talk to talk to somebody on the same system I got an 
error message -- talk : ntalk/udp: service is not registered.

I checked the /etc/services and /etc/inetd.conf and they seem O.K. to me.
Does anyone know how to solve this problem ?  Thanks in advance !!  
The E-mail address is yhsieh at cadence.com 

The /etc/inetd.con contains these entries :

  talk	dgram	udp	wait	/etc/talkd	talkd
  ntalk	dgram	udp	wait	/usr/etc/ntalkd		ntalkd

The /etc/services contains these entries :

  talk		517/udp
  ntalk		518/udp

====================================================================
I    Tommy Hsieh              I    Cadence Design System, Inc.     I
I    yhsieh at cadence.com       I    3393 Octavius Drive             I
I    (408) 987-5285           I    Santa Clara, CA 95054-3082      I
====================================================================