Problem in v2 and v3 support....

Hi All,
 
   I am using net-snmp-5.0.7--> successfully compiled and running fine.
I compiled it for v3 support with openssl. 
 
  It worked for v2 testing.. as shown below :
  snmpget -c broadcom -v 2c 192.168.31.14 system.sysUpTime.0
  DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (17647) 0:02:56.47

  I have few problems. when I try to test for v3, my command goes as
below :
 snmpget -v 3 -u myuser -l authNoPriv -a MD5 -A my_password
192.168.31.14 sysUpTime.0
 snmpget: Authentication failure (incorrect password, community or key)
(Sub-id not found: iso -> sysUpTime)

I tried mentioning community name also.
 
snmpget -c broadcom -v 3 -u myuser -l authNoPriv -a MD5 -A my_password
192.168.31.14 sysUpTime.0
snmpget: Authentication failure (incorrect password, community or key)
(Sub-id not found: iso -> sysUpTime)

 I couldn't make it why it is happening so? I used following command to
create a user :
 net-snmp-config --create-snmpv3-user -a "my_password" myuser 
 
 My /usr/local/share/snmp/snmpd.conf file looks like as shown below.
-------------snmpd.conf----------begins-------------- 
 
#       sec.name  source          community
com2sec readable     default         broadcom
com2sec writable     default         broadcom
com2sec readable     default         bcm
#com2sec readable     default         public
#com2sec writable     default         broadcom
 
# Second, map the security name into a group name:
 
#       groupName      securityModel securityName
 
group   ROGroup        v1            readable
group   ROGroup        v2c           readable
group   ROGroup        usm           readable
 
group   RWGroup        v1            writable
group   RWGroup        v2c           writable
group   RWGroup        usm           writable
 
group   RWGroup        v1            brcm
group   RWGroup        v2c           brcm
group   RWGroup        usm           brcm
####
# Third, create a view for us to let the group have rights to:
 
#       name    incl/excl     subtree         mask(optional)
view    all     included      .1
 
# Finally, grant the group read-only access to the systemview view.
 
#       group   context sec.model sec.level prefix read   write  notif
access  ROGroup ""      any       noauth    exact  all    none   none
access  RWGroup ""      any       noauth    exact  all    all   none
 
#Configure the trap managers and trap community
trapcommunity broadcom
#trapcommunity broadcom
 
#Configure the IP address of the managers required to receive the traps
trapsink  192.168.31.121
trap2sink 192.168.31.121

rwuser myuser

-------------snmpd.conf----------ends--------------
 
Please help me out for the same.
please dont ask me to use other versions of net-snmp, as I am facing
lots of problem while compiling for my board.
 
Thanx in Advance....
 
Regards,
Raghavendra. S