net-snmpd/ucd-snmp: issues under FreeBSD 6.2 amd64 ? (physmem: Cannot allocate memory)

[Olivier Mueller]

Hello,

I'm trying to start net-snmpd or ucd-snmp on a brand new
amd64-system (hp dl360g5, 4GB ram, dual xeon), and all
I get is the message:

Sep 14 08:11:02 db3 snmpd[64634]: sysctl: physmem: Cannot allocate  
memory

on start with net-snmpd, and this with ucd-snmpd:

[root at db3 ~]# /usr/local/etc/rc.d/snmpd start
Starting snmpd.

nlist err: neither nproc nor _nproc found.
sysctl: physmem: Cannot allocate memory
nlist err: neither total nor _total found.
nlist err: neither proc nor _proc found.
improper port specification /var/run/snmpd.pid
Server Exiting with code 1

[root at db3 ~]# sysctl -a |grep physmem
hw.physmem: 4281905152

I have no problems like that with snmpd on other servers, but
they are all running an i386-version of Freebsd: problem
seems related to amd64 ?  There are some posts, all
still without answers, about this problem on the same platform:

http://unix.derkeiler.com/Mailing-Lists/FreeBSD/questions/ 
2004-11/2994.html
http://unix.derkeiler.com/Mailing-Lists/FreeBSD/questions/ 
2004-11/1375.html
etc.

Any suggestion?  I'd be glad to help solving this problem, if  
possible...
regards,
Olivier