Java Programming

i have the following code:

/*import org.apache.commons.net.ftp.*;
import com.jscape.inet.ftp.*;
import java.net.*;
public class FTPDownload {
	public static void main(String[] args) {
		Ftp ftp=new Ftp("ftp.myserver.com","jsmith","secret");
		ftp.connect();
		ftp.download(arg0);
		// Eventually other operations here ...
		ftpclient.disconnect();
		

	}

}*/
import com.jscape.inet.ftp.*;
import java.io.*;
import java.util.Enumeration;

public class FTPDownload extends FtpAdapter {
    public static void main(String[] args) {
        try {
        	Ftp ftp=new Ftp("ftp://194.44.214.3","",""); //stabilim conexiunea
            ftp.connect(); //ne conectam
            String listing=ftp.getDirListingAsString(); //listam directoarele de pe FTP-ul curent
            System.out.println(listing+"\n");
            Enumeration files=ftp.getDirListing();
            while(files.hasMoreElements())
            {
            	FtpFile file=(FtpFile)files.nextElement();
            	if(file.isDirectory())
            	{
            		System.out.println(file.getFilename());
            	}
            }
            ftp.setLocalDir(new File("C:/tmp")); //directorul unde se salveaza fisierele
            ftp.setDir("temp"); //setez directorul curent de pe FTP; by default, acesta este directorul asignat la prima logare pe FTP
            //ftp.setAscii(); //in special doar pentru fisiere text 
            ftp.setBinary(); //setez modul ASCII pentru imagini, executabile...
            ftp.download("test.txt"); //downloadeaza fisierul din directorul curent de pe FTP, si il salveaza fisierul in directorul local setat
            //ftp.upload(new File("c:/tmp/test.txt")); //pentru uploadare fisier
            ftp.disconnect();
        }
        catch(Exception e) {
            e.printStackTrace();
        }
    }
}

but at the runtime i got an exception, and i don't know why, that ftp exists and i wanna download a file.
but before, i perform a listing of existing directories.
what's wrong?