error while receiving a pdu from

[<baranowb () op pl>]

Hi. 
I have compiled snort 2.1.0 on Solaris 5.9. Then I commited this " snort -c /opt/snort/etc/snort.conf -A console " and 
afterwards this "ping 255.255.255.255".
On the console I got this:

-*> Snort! <*-
Version 2.1.0 (Build 9)
By Martin Roesch (roesch () sourcefire com, www.snort.org)
Sep 12 17:35:12 luna /usr/lib/snmp/snmpdx: error while receiving a pdu from x.y.z.c.57935: The message has a wrong 
version (1)
Sep 12 17:35:13 luna last message repeated 1 time
Sep 12 17:35:14 luna /usr/lib/snmp/snmpdx: agent_process() : bad community from x.y.z.c
Sep 12 17:35:14 luna /usr/lib/snmp/snmpdx: local pdu process error
Sep 12 17:35:14 luna /usr/lib/snmp/snmpdx: session_send_loopback_request() failed
Sep 12 17:35:14 luna /usr/lib/snmp/snmpdx: error while receiving a pdu from x.y.z.c.57935: The message has a wrong 
version (1)

What is wrong? I have searched mail archive and google, and found nothing, exept for IDS logs which won't give me clue 
what is wrong.