snmpv3 authorization error

Hi,
 
I have been trying to set up a snmpV3 user configuration. So a question you have no doubt been asked millions of times before.
 
I have added snmp master agent code to my embedded code, so I have not extended the snmp agent, nor am I using agentx. I run init_agent, my MIB inits, init_snmp, init_master_agent, snmp_store and then loop running agent_check_and_process to process snmp requests. This works fine.
As our setup has a read-only file system apart from one directory, I have used set_configuration_directory and set_persistent_directory to set up snmpd.conf files.
 
I then added rwuser steve1 noauth and rwuser steve3 auth to my snmpd.conf file that also had rocommunity and rwcommunity settings. I then added createUser stevev1 and createUser stevev3 MD5 "my_password" DES to my persistent snmpd.conf file.
 
When I run my agent I see the persistent createUser lines disappear and the encrypted data appear as expected.
 
If I do a 
snmpget –v 3 –u steve1 –l noAuthNoPriv –A my_password –a MD5 targetIP Objectname 
on the noauth user, I successfully get the response data. 
 
If I do a 
snmpget –v 3 –u steve3 –l noAuthNoPriv –A my_password –a MD5 targetIP Objectname 
on the auth user I get AuthorizationError (access denied to the object)
OR
snmpget –v 3 –u steve3 –l AuthNoPriv –A my_password –a MD5 targetIP Objectname 
on the auth user I get Authentication failure (incorrect password, community e.t.c)
 
If I do a 
snmpget –v 3 –u steve –l noAuthNoPriv –A my_password –a MD5 targetIP Objectname 
I get Unknown user name as expected.
 
So I am a little confused, my user names are obviously being registered/remembered, but my password apparently is not.
Do you know why this might be happening from the limited info I have given above?
 
In my standalone design, do I also need to run some init functions for user data mib modules?
 
Regards,
Steve


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