[AGENT++] trap is sent with success but manager does't receive it?

[Dario maljur]

Hello.

I'm using AdRem as my manager.
I tried to receive it with example of trap receive in
snmp++/examples/receive_trap.cpp and it works OK.
The port and address are all set good. This is code that sends a trap. 
The CSnmpLeaf class is inherited from MibLeaf.

int CSnmpLeaf::SendTrap(I_cAgentEngine *pengine, string address, unsigned
short port)
{
  UdpAddress addr(address.c_str());
  addr.set_port(port);
  SnmpTarget *target;
  Pdu pdu;                               // construct a Pdu object

  Vb vb = this->GetTargetVB();            //set the value
  vb.set_oid(this->get_oid());                 
  UTarget utarget(addr);
   
       
   pdu += vb;                             // append the vb to the pdu
   pdu.set_notify_id(this->get_oid());               // set the id of the
trap
    
  
   pdu.set_notify_enterprise(theFirm);       // set up the enterprise of the
trap
     utarget.set_security_name(pengine->securityName);
     utarget.set_version(version3);          // set the SNMP version SNMPV1
or V2 or V3
     utarget.set_retry(1);            // set the number of auto retries
     utarget.set_timeout(100);          // set timeout
     utarget.set_security_model(pengine->securityModel);
   pdu.set_security_level(pengine->securityLevel);
   pdu.set_context_name (pengine->contextName);
   pdu.set_context_engine_id(pengine->contextEngineID);
   target = &utarget;

   int iErr = 0;
   iErr = pengine->GetSnmp()->trap( pdu,*target);
    agent_log->AppendLog("CSnmpLeaf::SendTrap: iErr on SendTrap =
%s",pengine->GetSnmp()->error_msg(iErr));
    
 return iErr;
}

And when I try to use inform instead of trap(.)  I get v3MP: EngineIDTable,
don't know engine id for host, port.
I tried changing the version to 1,2, and 3 but now success.