I start backhand, but I can only see myself on the status page. Why?

All,

I apologize if this subject has been dealt with before...I looked through
the archives for the last several months and couldn't find anything
applicable.

At the FAQ, there is a question (stated in the subject) that is
representative of my problem [1].  I think I have the cluster set up
correctly (including the recommendations at [1]); however, when I "hit" the
backhand status/diagnostic page, only the local host is shown (in red).

I assume that this is a problem with my configuration instead of a problem
with the diagnostics page itself.  I looked at the tcpdump utility output
and it appears that both application servers are broadcasting information
(as they should) - tcpdump snippets below.  However, how can I tell if the
local application server (i.e. mod_backhand module) is "accepting"
broadcasts from the the other application servers?

Any help you guys could give me regarding a fix or a way to further diagnose
the problem would be much appreciated.

[1] http://www.backhand.org/mod_backhand/FAQ.shtml#question12

Cheers
--
Here is the cluster information:
--
Application server 1 (AS1): 163.1.13.16
Application server 2 (AS2): 163.1.13.17
--

Here are the relevant httpd.conf snippets:
--
On AS1:

<IfModule mod_backhand.c>
  UnixSocketDir /usr/local/apache/backhand
  MulticastStats 163.1.13.16 163.1.13.255:4445
  AcceptStats 163.1.13.0/24

  <Location "/backhand/">
    SetHandler backhand-handler
  </Location>
</IfModule>

On AS2:

<IfModule mod_backhand.c>
  UnixSocketDir /usr/local/apache/backhand
  MulticastStats 163.1.13.17 163.1.13.255:4445
  AcceptStats 163.1.13.0/24

  <Location "/backhand/">
    SetHandler backhand-handler
  </Location>
</IfModule>
--

Here are the tcpdump snippets:
--

From AS1:

[root@climateapps1:/usr/local/apache/bin]# tcpdump |grep 163.1.13.255
tcpdump: listening on eth0
07:46:12.231417 climateapps1.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:46:12.397260 climateapps2.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:46:13.231375 climateapps1.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:46:13.397257 climateapps2.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:46:14.231383 climateapps1.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:46:14.397252 climateapps2.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:46:15.231402 climateapps1.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:46:15.397269 climateapps2.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:46:16.231495 climateapps1.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:46:16.397252 climateapps2.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)

212 packets received by filter
0 packets dropped by kernel

From AS2:

[root@climateapps2:/usr/local/apache/logs]# tcpdump |grep 163.1.13.255
tcpdump: listening on eth0
07:44:22.494652 climateapps2.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:44:23.328584 climateapps1.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:44:23.494604 climateapps2.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:44:24.328587 climateapps1.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:44:24.494613 climateapps2.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:44:25.328602 climateapps1.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:44:25.494597 climateapps2.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:44:26.328591 climateapps1.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)
07:44:26.494595 climateapps2.oucs.ox.ac.uk.4445 > 163.1.13.255.4445: udp 100
(DF)

162 packets received by filter
0 packets dropped by kernel
--

--
   Steve Bannerman
   [email protected]
   44.(0)1865.273866