i got a question about naming service

[<folke sina com cn>]

#include "RouterDriver-skelimpl.c"
#include "ORBitservices/CosNaming.h"
#include <string.h>
#include <stdio.h>


int
main(int argc, char* argv[])
{
  CORBA_ORB                 orb;
  CORBA_Environment*        ev;
  PortableServer_ObjectId*  oid;
  Router_Driver             obj_routerDriver;
  PortableServer_POA        root_poa;
  PortableServer_POAManager pm;
  FILE                      *fd_iorFile = NULL;
  char                      ac_iorBuf[1024] = {'\0'};
  CORBA_Object              nameServer;
  CosNaming_NameComponent   name_component[3] = { {"Linux",  "subcontext"},
                                {"Server", "subcontext"},
                                {"Driver", "server"} };
  CosNaming_Name name = {3, 3, name_component, CORBA_FALSE};
  gchar*            dummy_argv[2];
  gint              dummy_argc;


  ev = g_new0(CORBA_Environment,1);

  CORBA_exception_init(ev);
  orb = CORBA_ORB_init(&argc, argv, "orbit-local-orb", ev);
  
  root_poa = (PortableServer_POA)CORBA_ORB_resolve_initial_references(orb, "RootPOA", ev);
  
  obj_routerDriver = impl_Router_Driver__create(root_poa, ev);
   //     impl_Router_Driver__create() is a function defined in my RouterDriver-stubs.c

  fd_iorFile = fopen("nameservice.ior", "r");
  if (fd_iorFile == NULL){
      printf("failed to register service!\n");
      exit(-1);
  }
  fgets(ac_iorBuf, 1024, fd_iorFile);
  if (ac_iorBuf[strlen(ac_iorBuf)-1] == '\n'){
     ac_iorBuf[strlen(ac_iorBuf)-1] = '\0';
  }
  fclose(fd_iorFile);
  nameServer = CORBA_ORB_string_to_object(orb, ac_iorBuf, ev);
  if (ev->_major != CORBA_NO_EXCEPTION) {
   fprintf (stderr, "Error: could not get name service: %s\n", CORBA_exception_id(ev));
      exit (-1);
  }
  CosNaming_NamingContext_bind(nameServer, &name, obj_routerDriver, ev);
  if (ev->_major != CORBA_NO_EXCEPTION) {
   fprintf (stderr, "Error: could register object: %s\n", CORBA_exception_id(ev));
      exit (-1);
  }

  pm = PortableServer_POA__get_the_POAManager(root_poa, ev);
  
  PortableServer_POAManager_activate(pm, ev);
  
  CORBA_ORB_run(orb, ev);
  return 0;
}

i build the server and run it,  
it exits with 
   Error: could register object: IDL:omg.org/CosNaming/NamingContext/NotFound:1.0
i am not sure whether i followed the correct procedure of calling a name service,
so i wonder how can i fix this problem.

thanks in advance
folke