help me for proftp problem

I am using WHM/Cpanel with RH

1. proFTP (cannot login with proftp at beginning)
--------------
connecting to 69.93.x.x:21
Connected to 69.93.x.x port 21
220 ProFTPD 1.2.9 Server (ftp.server1.com) [69.93.x.x]
USER anonymous@domain.com
331 Password required for anonymous@domain.com.
PASS (hidden)
530 Login incorrect.
! Logon failure, so quitting

2. change to pureFTP (also cannot login with pureftp)
----------------
connecting to 69.93.x.x:21
Connected to 69.93.x.x port 21
220-=(<*>)=-.:. (( Welcome to PureFTPd 1.0.12 )) .:.-=(<*>)=-
220-You are user number 1 of 50 allowed.
220-Local time is now 20:51 and the load is 0.00. Server port: 21.
220 You will be disconnected after 15 minutes of inactivity.
USER anonymous@domain.com
331 User anonymous@domain.com OK. Password required
PASS (hidden)
530 Authentication failed, sorry
! Logon failure, so quitting

3. change it back to proFTP (i can login with the id and pw)
----------------------
connecting to 69.93.243.70:21
Connected to 69.93.243.70 port 21
220 ProFTPD 1.2.9 Server (ProFTPD) [host.server2.net]
USER anonymous@domain.com
331 Password required for anonymous@domain.com.
PASS (hidden)
230 User anonymous@domain.com logged in.
PWD
257 "/" is current directory.
SYST
215 UNIX Type: L8
Host type (S): UNIX (standard)
PASV
227 Entering Passive Mode (69,93,x,x,129,178).
connecting to 69.93.x.x:33202
- -
connecting to 69.93.x.x:33202
Connected to 69.93.x.x port 33202
LIST
150 Opening ASCII mode data connection for file list
Received 133 bytes in 0.1 secs, (10.00 Kbps), transfer succeeded
226 Transfer complete.

and I restart the FTP server by WHM (i cannot login again)
-----------------------
connecting to 69.93.x.x:21
Connected to 69.93.x.x port 21
220 ProFTPD 1.2.9 Server (ftp.server1.com) [69.93.x.x]
USER anonymous@domain.com
331 Password required for anonymous@domain.com.
PASS (hidden)
530 Login incorrect.
! Logon failure, so quitting

Can anyone solve the problem for me? I did not change anything, but do not know why sometime, it will connect to ftp.server1.com and connect to host.server2.net sometime. ftp.server1.com and host.server2.net hosted at same server with same IP address and I did not change the login id, pw and host address too.

 

 

 

 

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