xymon-4.2.2 logs error:"illegal attempt to update " and "Oversize status msg ..ports " messages in xymon server logs.

Hi, we have 288 clients being monitored on single server.i am getting these error msgs on the server's logs. In rrd-status.log,i get 2009-07-20 12:50:22 RRD error updating /opt/xymon/data/rrd/hostname.domainname/tcp.conn.rrd from 172.29.3.202: illegal attempt to update using time 1248074422 when last update time is 1248074422 (minimum one second step)

and in "hobbitd.log" i get, First line: hostname.domainanme|linux|linux 2009-07-23 23:34:31 Oversize status msg from 172.29.1.153 for hostname.domainname:ports truncated (n=517820, limit=262144) 2009-07-23 23:34:32 Oversize data/client msg from 172.29.1.168 truncated (n=2678572, limit 524288)

I have checked the archieves,it says like

edit these variables in hobbitserver.cfg

MAXMSG_STATUS="768432"

MAXMSG_DATA="524288"

MAXMSG_CLIENT="768432"

but i dont find any of these variabl;es anytwhere.

please tell me where and how to solve thios problem?

-- Pankaj V. Dorlikar