asterisk users - Nov 2003 - Warning: File chan_sip.c, Line 462

Hello all

I already install and able to use Asterisk as voicemail.
But after Asterisk is ready, we found lot of following warning(WARNING 5126).
Is there any solusion of stopping this warning.
Please help me.

[Warning}
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WARNING[1024]: File cdr_pgsql.c, Line 194 (my_load_module): Unable to load
config for PostgreSQL CDR's: cdr_pgsql.conf
  == Parsing '/etc/asterisk/enum.conf': Found
Asterisk Ready.
*CLI> WARNING[5126]: File chan_sip.c, Line 462 (retrans_pkt): Maximum retries
exceeded on call 496d26fd7255f1b767391c16291a0a1f@192.168.0.100 for seqno 102
(Request)