Por favor me ajudem!

import java.io.*;
import java.util.*;
import org.omg.CosNaming.*;
import org.omg.CORBA.*;
import org.omg.PortableServer.*;
import java.net.*;

public class FileClient {
   public static void main(String argv[])
   {
      try 
   {
      
		   
      // Crea e inicializa el ORB 
      ORB orb = ORB.init(argv, null); 

      // Obtiene el contexto de nombrado raiz 
      org.omg.CORBA.Object objRef = orb.resolve_initial_references("NameService"); 
      NamingContext ncRef = NamingContextHelper.narrow(objRef); 

      // Resuelve la referencia al objeto en el nombrado 
      NameComponent nc = new NameComponent("FileTransfer", ""); 
      NameComponent path[] = {nc}; 
      FileInterface helloRef = FileInterfaceHelper.narrow(orb.string_to_object("corbaname:iiop:1.2@localhost#FileTransfer"));

      	//ncRef.resolve(path)); 

      // Llama al objeto servidor Hello e imprime el resultado 
     			
    if(argv.length < 1) 
			{
                System.out.println("Usar: java ArquivoCliente NomedoArquivo");
         }
	String hostName =new String(InetAddress.getLocalHost().toString());
				           
         // save the file
      	long startTime = System.currentTimeMillis();
        File file = new File("C:\\" + argv[0]);
         byte data[] = helloRef.downloadFile(argv[0], hostName);
         
			BufferedOutputStream output = new BufferedOutputStream(new FileOutputStream(file));
         
			             
			// Criando a copia do arquivo a ser recebido do servidor
            
         System.out.println("Tamanho do arquivo " +data.length);   
	 	 // Salvando no disco
          output.write(data, 0, data.length);
     	    output.flush();
           output.close();
        	long stopTime = System.currentTimeMillis();
			System.out.println("Tempo em msecs = "+ (stopTime - startTime));           
    
        
			
      } 
		catch(Exception e) 
		{
         System.out.println("FileClient Error: " + e.getMessage());
         e.printStackTrace();
      }
   }
}