Getting "Connection refused" when runing hprop from master

I trying to replicate the database from a master to a slave using hprop. 
However, I am getting this error:

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master# hprop -v kdc-slave-pre.example.com
connect(kdc-slave-pre.example.com): Connection refused
hprop: failed to contact kdc-slave-pre.example.com
hprop: connect kdc-slave-pre.example.com: Connection refused
---------------------------------------------------

I created the principal "hprop/kdc-slave-pre.example.com" on both the 
master and slave with the same password.

On the slave, I exported the principal hprop/kdc-slave-pre.example.com 
to the file /var/lib/heimdal-kdc/prop.keytab and I run this:

slave# hpropd -i --keytab=/var/lib/heimdal-kdc/prop.keytab

I see a little bit of network traffic from the master on the slave. This 
is all I see on the slave side:
---------------------------------------------------
10:35:01.111888 IP 171.67.218.9.43986 > 10.111.1.197.754: Flags [S], seq 
4050254657, win 14600, options [mss 1460,sackOK,TS val 1622827709 ecr 
0,nop,wscale 7], length 0
10:35:01.111938 IP 10.111.1.197.754 > 171.67.218.9.43986: Flags [R.], 
seq 0, ack 4050254658, win 0, length 0
---------------------------------------------------

The principal 'kadmin/hprop' exists on both master and slave (although 
with different passwords).

Any ideas?