Hi, i have the same probleme. I dont find tutorial to configure the snmp part. Do you have find your happiness?
This link is NOK : http://wiki.ocsinventory-ng.org/index.php?title=Documentation:SNMP
And i find nothing to help me, and i m a perfect Windows'user. I try to learn Linux, i mont my server, install and configure. All is ok, i have many informations but SNMP dont work... :(