can't transfer file between 2 FTP Servers

[MavFXP]

I'm trying to FXP between 2 computers, one running WS_FTP Server v5 and the other running Serv-U FTP Server 6.1.0.4.

I can successfully connect to both in FlashFXP but here is the error I get when I try and transfer a file from one to the other:

[R] Transfer Failed!
[L] CWD /users/Group
[L] 425 Can't open data connection.


Is there any setting that requires modification to transfer between 2 FTP Servers?

Thanks

[MxxCon]

http://www.inicom.net/forum/showthread.php?t=4745
those 3 lines are not enough. need to see more

[MavFXP]

* FlashFXP v3.3.5 Build1110 BETA
* WinXP
* Running behind NAT/router Billion7420, port 21 forwarded (but does an FXP transfer between 2 other computers have something to do with my Router?)
* Running firewall NO
* Running Antivirus NO
* Network ADSL


WinSock 2.0 -- OpenSSL 0.9.8a 11 Oct 2005
[L] Connecting to J FTP -> DNS= PORT=21
[L] Connected to J FTP
[L] 220 X2 WS_FTP Server 5.0.0 (3980371150)
[L] USER
[L] 331 Password required
[L] PASS (hidden)
[L] 230 user logged in
[L] SYST
[L] 215 UNIX
[L] FEAT
[L] 211-Extensions supported
[L] SIZE
[L] MDTM
[L] MLST size*;type*;perm*;create*;modify*;
[L] LANG EN*
[L] REST STREAM
[L] TVFS
[L] UTF8
[L] AUTH SSL;TLS-P;
[L] PBSZ
[L] PROT C;P;
[L] 211 end
[L] PWD
[L] 257 "/users/group" is current directory
[L] TYPE A
[L] 200 Type set to ASCII.
[L] Listening on PORT: 1962, Waiting for connection.
[L] PORT 192,168,1,1,7,170
[L] 200 command successful
[L] LIST -al
[L] 150 Opening ASCII data connection for directory listing
[L] 226 transfer complete
[L] List Complete: 243 bytes in 2.41 seconds (0.1 KB/s)
[R] Connecting to N's FTP ->
[R] Connected to N's FTP
[R] 220 Serv-U FTP Server v6.1 for WinSock ready...
[R] USER
[R] 331 User name okay, need password.
[R] PASS (hidden)
[R] 230 User logged in, proceed.
[R] SYST
[R] 215 UNIX Type: L8
[R] FEAT
[R] 211-Extension supported
[R] CLNT
[R] MDTM
[R] MDTM YYYYMMDDHHMMSS[+-TZ];filename
[R] SIZE
[R] SITE PSWD;EXEC;SET;INDEX;ZONE;CHMOD;MSG
[R] REST STREAM
[R] XCRC filename;start;end
[R] MODE Z
[R] MLST Type*;Size*;Create;Modify*;Win32.ea*;
[R] 211 End
[R] CLNT FlashFXP 3.3.5.1110
[R] 200 Noted.
[R] PWD
[R] 257 "/" is current directory.
[R] TYPE A
[R] 200 Type set to A.
[R] MODE Z
[R] 200 MODE Z ok.
[R] Listening on PORT: 1964, Waiting for connection.
[R] PORT 192,168,1,1,7,172
[R] 200 PORT Command successful.
[R] LIST -al
[R] 150 Opening ASCII mode data connection for /bin/ls.
[R] 226 Transfer complete.
[R] List Complete: 2 KB in 2.17 seconds (1.1 KB/s)
[L] CWD outgoing
[L] 250 CWD successful
[L] PWD
[L] 257 "/users/outgoing" is current directory
[L] Listening on PORT: 1965, Waiting for connection.
[L] PORT 192,168,1,1,7,173
[L] 200 command successful
[L] LIST -al
[L] 150 Opening ASCII data connection for directory listing
[L] 226 transfer complete
[L] List Complete: 388 bytes in 1.33 second (0.3 KB/s)
[R] CWD BT Downloads
[R] 250 Directory changed to / Downloads
[R] PWD
[R] 257 "/ Downloads" is current directory.
[R] Listening on PORT: 1966, Waiting for connection.
[R] PORT 192,168,1,1,7,174
[R] 200 PORT Command successful.
[R] LIST -al
[R] 150 Opening ASCII mode data connection for /bin/ls.
[R] 226 Transfer complete.
[R] List Complete: 2 KB in 1.17 second (2.4 KB/s)
[L] CWD txt.file
[L] 250 CWD successful
[L] PWD
[L] 257 "/users/" is current directory
[L] Listening on PORT: 1967, Waiting for connection.
[L] PORT 192,168,1,1,7,175
[L] 200 command successful
[L] LIST -al
[L] 150 Opening ASCII data connection for directory listing
[L] 226 transfer complete
[L] List Complete: 360 bytes in 2.16 seconds (0.2 KB/s)
[R] MODE S
[R] 200 MODE S ok.
[L] PASV
[L] 227 Entering Passive Mode (203,214,121,227,8,101).
[R] PORT 203,214,121,227,8,101
[R] 200 PORT Command successful.
[R] STOR txt.file
[R] 150 Opening ASCII mode data connection for file.txt
[L] RETR file.txt
[R] 425 Cannot open data connection.
[L] ABOR
[L] 226 abort successful
[R] ABOR
[R] 226 ABOR command successful.
[R] Transfer Failed!
[L] Listening on PORT: 1974, Waiting for connection.
[L] PORT 192,168,1,1,7,182
[L] 425 Can't open data connection.
[L] 200 command successful
[L] LIST -al
[L] 150 Opening ASCII data connection for directory listing
[L] 226 transfer complete
[L] List Complete: 360 bytes in 2.14 seconds (0.2 KB/s)
[R] MODE Z
[R] 200 MODE Z ok.
[R] Listening on PORT: 1975, Waiting for connection.
[R] PORT 192,168,1,1,7,183
[R] 200 PORT Command successful.
[R] LIST -al
[R] 150 Opening ASCII mode data connection for /bin/ls.
[R] 226 Transfer complete.
[R] List Complete: 2 KB in 1.52 second (1.9 KB/s)
Transfer queue completed
1 File failed to transfer

[MxxCon]

one server is on your local LAN and other is out on the internet?

[MavFXP]

both FTP servers I'm trying to transfer between are on PC's "out on the internet".

[MxxCon]

try to enable alternative fxp mode in site manager

you need to forward port 21 only if YOU are running server on that port.
if you are a client, you need forward data connection port range. pick some range of ~100ports and configure flashfxp and your router to use them.