Snmpset not working for shell script

For Developers
1

I made the following shell script to perform a simple operation.

#!/bin/sh
#name file: /etc/snmp/TestSet.sh
id = $1
ping id

and

chmod a+wx TestSet.sh

I also config setting the in "/etc/confing/snmp"

config extend
        option name 'testset'
        option prog '/bin/sh'
        option args '/etc/snmp/TestSet.sh'
        option group 'private'
        option secname 'rw'
        option community 'private'

now, i want to input it with this command

snmpset -v2c -Ir -c private 127.0.0.1 NET-SNMP-EXTEND-MIB::nsExtendInput."testset" s "8.8.8.8"

but i get error

NET-SNMP-EXTEND-MIB::nsExtendInput.testset: Unknown Object Identifier (Index out of range: testset (nsExtendToken))