Setting up a KDC slave with redhat 7.1

[Pierre Detombes]

I have set up a master KDC, and now, I'm trying to propagate-it to a
slave KDC using kpropd.

in /etc/xinetd.d, I have these files :
   eklogin: service eklogin
            {   
             disable = no
             server  = /usr/kerberos/sbin/klogind
             server_args  = -e -5
             (some other lines ...)
            }
   krb5_prop: service krb5_prop
             {
             disable = no
             server = /usr/kerberos/sbin/kpropd
             (...)
              }
KDC and kerberos services seems to work well on both systems for my
REALM. But when I try to manualy propagate the KDC database with
kprop:

   # kprop -d -f /var/kerberos/krb5kdc/slave_datatrans \
                                  kerberos-1.mydomain.net 

it returns:

  kprop: Bad encryption type while getting initial ticket.

Can anyone help me on this problem ? Tanks.

Pierre