请高手赐教！很急！
本段程序是实现按照本地机器上的一个文件夹目录结构传送到ＦＴＰ服务器上的功能，为了简化方便高手的解答我只传送一层，多层跟这个一样的问题！下面程序中一个是判断文件和文件夹的，两个相互分开时，可以运行，但放在一起会出错！
错误信息：
java.io.FileNotFoundException:   CWD   /2:   550   /2/???¨??????:   Failed   to   create.

at   sun.net.ftp.FtpClient.readReply(Unknown   Source)
at   sun.net.ftp.FtpClient.issueCommand(Unknown   Source)
at   sun.net.ftp.FtpClient.issueCommandCheck(Unknown   Source)
at   sun.net.ftp.FtpClient.cd(Unknown   Source)
at   shareit.ftp.FtpConnection.run(FTPtxt.java:110)
sun.net.ftp.FtpProtocolException:   PORT   :500   'EPRT ':   command   not   understood.

at   sun.net.ftp.FtpClient.openDataConnection(Unknown   Source)
at   sun.net.ftp.FtpClient.put(Unknown   Source)
at   shareit.ftp.FtpConnection.run(FTPtxt.java:118)
sun.net.ftp.FtpProtocolException:   PORT   :500   'EPRT ':   command   not   understood.

at   sun.net.ftp.FtpClient.openDataConnection(Unknown   Source)
at   sun.net.ftp.FtpClient.put(Unknown   Source)
at   shareit.ftp.FtpConnection.run(FTPtxt.java:118)
sun.net.ftp.FtpProtocolException:   PORT   :500   'EPRT ':   command   not   understood.

at   sun.net.ftp.FtpClient.openDataConnection(Unknown   Source)
at   sun.net.ftp.FtpClient.put(Unknown   Source)
at   shareit.ftp.FtpConnection.run(FTPtxt.java:118)

源程序是：
package   shareit.ftp;

import   java.io.File;
import   java.io.FileInputStream;
import   java.io.IOException;
import   sun.net.TelnetOutputStream;
import   sun.net.ftp.FtpClient;

class   Node
{
File[]   fle;
}
  class   FtpConnection   extends   Thread
{       //private     String   user;
        //private     String   password;

        private     FtpClient   ftpclient;
FtpConnection()
{
  try{ftpclient=new   FtpClient( "192.168.0.66 ",21);
 
          Login();
        }
catch(Exception   e){}
}
  public   void   Login()
{
try   {

ftpclient.login( "winterzd ",   "2251780 ");


}   catch   (IOException   e)   {
e.printStackTrace();
}
}
  public   void   Logout()
  {
 
  ftpclient.sendServer( "QUIT\r\n ");
                int   reply   =   0;
try   {
reply   =   ftpclient.readServerResponse();
}   catch   (IOException   e)   {

e.printStackTrace();
}
System.out.println(reply);
  }
public   void   run()
{
try   {

 
  //readirt();
    //*********************************************
File   file=new   File( "D:\\2 ");

File[]   filelist=file.listFiles();

  int   count=filelist.length;
  System.out.println(count);
            int   i=count-1;
            while(i> =0)
            {