[Xymon] Xymon client only reports once

[Mark]

I've installed Xymon on my home network as testing for a possible installation 
at work.  It's working fine on three out of the four systems, but on the 
fourth, the client only reports its status to the server once, immediately 
after being started.

The problem computer is a Pentium MMX with 48MB RAM, running Gentoo Linux.

It looks as if the client is getting hung in the process of sending the second 
report: "ps aux" shows a sleeping "xymonlaunch" process, and the XYMONTMP 
directory contains a "xymon_vmstat" file with a timestamp five minutes after 
the successful update.

I could probably work around this with cron job to restart the client every 
five minutes, but I'd rather fix it properly.  Any suggestions on what might 
be going wrong, or other things I could look at?

Thanks, 
Mark Wagner