Row createtion not working (TARGET-MIB, NOTIFICATION-MIB)

Hi,
   
  Could it be that row-creation (create&wait) is not working for the TARGET-MIB?
   
  I tried:
  ------------
   snmpset -v 1 -c private localhost 1.3.6.1.6.3.12.1.2.1.9.61.62.63 i 5
  
Error in packet.
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: SNMP-TARGET-MIB::snmpTargetAddrRowStatus.'=>?'

   
  - The index to the table is an implied string, so I'm trying instance 61.62.63
    (length 3 is not required, it is implied)
  -  I'm passing 'i' for integer, and the value 5 (create&wait).
  - I got the communities set up in my snmpd.conf:
       rocommunity  public
       rwcommunity  private
  - I checked that snmpset works:
        snmpset -v 1 -c private localhost 1.3.6.1.2.1.1.5.0 s just-a-string
      SNMPv2-MIB::sysName.0 = STRING: just-a-string
   
  Maybe I'm missing something?
   
  Thanks,
  Erez.