error while executing the example

Hey!
I was just trying the examples given on the net-snmp site. When i
tried executed the first example, it showed me the following error:

[root@localhost ~]# ./snmpdemoapp
No log handling enabled - turning on stderr logging
Cannot find module (DISMAN-EVENT-MIB): At line 0 in (none)
Cannot find module (NET-SNMP-EXTEND-MIB): At line 0 in (none)
snmpget: Unknown user name


any idea????
--
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Computer Engineering Undergraduate(final year)
Dept of Computer Science and Engineering
Vellore Institute of Technology


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