Object not writable

Hi,

I'm new to snmp  I was trying the sub-agent example in this web site:

http://www.net-snmp.com/tutorial/tutorial-5/toolkit/demon/index.html

Compilation and execution of subagent went ok.  I was able to execute
snmpget and get the result ok.  However, when I executed (SNMPSET):

snmpset -v 2c -c public localhost NET-SNMP-TUTORIAL-MIB::
nstAgentSubagentObject.0 = 5

it says: notWritable (that object does not support modification)

SNMPTRANSLATE says:
NET-SNMP-TUTORIAL-MIB::nstAgentSubagentObject.0
nstAgentSubagentObject OBJECT-TYPE
  -- FROM       NET-SNMP-TUTORIAL-MIB
  SYNTAX        Integer32
  MAX-ACCESS    read-write
  STATUS        current
  DESCRIPTION   "This is an object that simply supports a writable integer
         when attached to the agent.  The object should be accessible
         when the agentx subagent containing this object is attached.
         See http://www.net-snmp.org/tutorial-5/toolkit/XXX for
         further implementation details."
  DEFVAL        { 2 }
::= { iso(1) org(3) dod(6) internet(1) private(4) enterprises(1)
netSnmp(8072) netSnmpExamples(2) netSnmpTutorialMIB(4) nstMIBObjects(1)
nstAgentModules(1) nstAgentSubagentObject(2) 0 }

Please help.

Thanks,
Chino