🚀 go-pugleaf

First I write a function to connect to the ftpserver(netflow FTP server)
(SunOS 5.8) ready,
Then I use      aftp.setRemoteFile("/opt");
           aftp.setAction(Ftp.a_ListDirectoryLong);

  to show the files of the directory,
  but the first connection to the server seems to be lost, and the second
connection to the server is established(netflow FTP server (SunOS 5.8)
ready), then the message (1530 Please login with USER and PASS) is shown
and the excepion message is (FTP protocol error. 530 Please login with USER
and PASS)


  Would you please tell me how to fix this problem?
  My Jbuilder version is Jbuilder 5
  Thank you very much!



The following lines are used to connect to the server, and it seems to be
fine
        aftp.setPassword(pwd);
        aftp.setRemoteHost(hostname);
        aftp.setTransferMode(Ftp.tm_ASCII);
        aftp.setUser(uid);
        aftp.setLocalFile(datadir);//����Ŀ�ĵ�ַ


        aftp.setAction(Ftp.a_Logon);


        /*
        System.out.println("before cd /opt");
      aftp.setRemotePath("/opt");
        System.out.println("after cd /opt");
*/

        } catch(Exception e){
              System.out.println("���ӷ�������:"+hostname);
              return false;}

        System.out.println("���ӵ�������:"+hostname);