In SNMP setting

1. First i write click 'Collectors' & click 'SNMP' create new SNMP.

2. Double click on that SNMP.
3.Edit Query window display .
In SNMP Server drop down only Address display
4. click 'Browse Queries' button
5. Select Query window open & click 'Select' button
Message display 'SNMPPlugin' window display and
Nothing Select message display.

Tell me setting how SNMP i configure .