File not transferred!

Connection to the server was succeeded as follows, but file cannot be transferred.
The file I want to send remains on the transfer Queue, not cleard.
I check the ftp command transaction via Protocol analyzer, and I found SmartFTP
doesn't issue retrieve command. Why ??

[09:38:25] SmartFTP v3.0.1024.32
[09:38:25] Resolving host name "169.254.151.178"
[09:38:25] Connecting to 169.254.151.178 Port: 21
[09:38:25] Connected to 169.254.151.178.
[09:38:25] 220-You are user number 1 of 1 allowed.
[09:38:25] 220 Service ready for new user.
[09:38:25] USER admin
[09:38:25] 331 User name okay, need password.
[09:38:25] PASS (hidden)
[09:38:25] 230 User logged in, proceed.
[09:38:25] SYST
[09:38:25] 215 UNIX Type: L8
[09:38:25] Detected Server Type: UNIX
[09:38:25] RTT: 0.211 ms
[09:38:25] FEAT
[09:38:25] 500 Syntax error, command unrecognized.
[09:38:25] TYPE I
[09:38:25] 200 Command okay.
[09:38:25] REST 0
[09:38:25] 500 Syntax error, command unrecognized.
[09:38:25] PWD
[09:38:25] 257 "/"
[09:38:26] TYPE A
[09:38:26] 200 Command okay.
[09:38:26] PASV
[09:38:26] 227 Entering Passive Mode. (169,254,151,178,172,132)
[09:38:26] Opening data connection to 169.254.151.178 Port: 44164
[09:38:26] LIST -aL
[09:38:26] 150 File status okay: about to open data connection.
[09:38:26] 604 bytes transferred. (39.3 KB/s) (15 ms)
[09:38:26] 226 Closing data connection. Requested file action successful.
[09:38:48] CWD /Clip
[09:38:48] 250 Changed to /Clip
[09:38:48] PWD
[09:38:48] 257 "/Clip"
[09:38:48] PASV
[09:38:48] 227 Entering Passive Mode. (169,254,151,178,229,6)
[09:38:48] Opening data connection to 169.254.151.178 Port: 58630
[09:38:48] LIST -aL
[09:38:48] 150 File status okay: about to open data connection.
[09:38:48] 5400 bytes transferred. (114 KB/s) (46 ms)
[09:38:48] 226 Closing data connection. Requested file action successful.
[09:38:58] The operation has been added to the Transfer Queue. Check the Transfer Queue for the status.
[09:39:18] NOOP
[09:39:18] 200 Command okay.

Check the transfer queue window (at the bottom) for the status of your transfer.

Is the transfer queue started?
Is the file stuck there with an error? In this case double click the file to get the detailed error.

Regards,
Mat

Thank you for your quick reply.

I checked the transfer queue window, they say
(Z z ).. fileName 3.81KB D\MyDocument\fileName Retry at 13:54:37

I double clicked the file and can get the detailed error as follows.
The maximum user number of the server is one.
Other FTP Clients has no problem for this server, but only SmartFTP cannot transfer a file.

[13:48:07] Initializing. Transfer Queue v1.0.17.32.
[13:48:07] Resolving host name "169.254.151.178"
[13:48:07] Connecting to 169.254.151.178 Port: 21
[13:48:07] Connected to 169.254.151.178.
[13:48:07] 421 1 users (the maximum) are already logged in.
[13:48:07] Source connection error.
[13:48:07] Server closed connection

Your server only allows one concurrent connection. Either disconnect the Remote Browser before your start the transfer or contact the server administrator to increase the number of concurrent connections.