Winscp error "Network error: Socket operation on non-socket"

I am trying to use Winscp on Windows 2003 server, to connect to a linux system running SSH.

I am able to connect to this particular linux system by using Winscp from any other system running windows XP or windows 7.
However when I try to connect using Winscp on windows 2003 server system, I get a dialog box with following message

"socket operation on non - socket", and the operation fails.

Has anyone come across the same error? Is there any solution for the problem ?

below is the content of the session.log file

. 2010-06-28 12:34:40.449 --------------------------------------------------------------------------
. 2010-06-28 12:34:40.449 WinSCP Version 4.0.7 (Build 370) (OS 5.2.3790 Service Pack 2)
. 2010-06-28 12:34:40.449 Login time: Monday, June 28, 2010 12:34:40 PM
. 2010-06-28 12:34:40.449 --------------------------------------------------------------------------
. 2010-06-28 12:34:40.449 Session name: session
. 2010-06-28 12:34:40.449 Host name: 192.168.0.84 (Port: 22)
. 2010-06-28 12:34:40.449 User name: environ (Password: No, Key file: No)
. 2010-06-28 12:34:40.449 Tunnel: No
. 2010-06-28 12:34:40.449 Transfer Protocol: SFTP (SCP)
. 2010-06-28 12:34:40.449 Ping type: -, Ping interval: 30 sec; Timeout: 15 sec
. 2010-06-28 12:34:40.449 Proxy: none
. 2010-06-28 12:34:40.449 SSH protocol version: 2; Compression: No
. 2010-06-28 12:34:40.449 Agent forwarding: No; TIS/CryptoCard: No; KI: Yes; GSSAPI: No
. 2010-06-28 12:34:40.449 Ciphers: aes,blowfish,3des,WARN,des; Ssh2DES: No
. 2010-06-28 12:34:40.449 Ciphers: aes,blowfish,3des,WARN,des; Ssh2DES: No
. 2010-06-28 12:34:40.449 SSH Bugs: -,-,-,-,-,-,-,-
. 2010-06-28 12:34:40.449 SFTP Bugs: -,-,-
. 2010-06-28 12:34:40.449 Return code variable: Autodetect; Lookup user groups: Yes
. 2010-06-28 12:34:40.449 Shell: default, EOL: 0
. 2010-06-28 12:34:40.449 Clear aliases: Yes, Unset nat.vars: Yes, Resolve symlinks: Yes
. 2010-06-28 12:34:40.449 Alias LS: No, Ign LS warn: Yes, Scp1 Comp: No
. 2010-06-28 12:34:40.449 Local directory: default, Remote directory: home, Update: No, Cache: Yes
. 2010-06-28 12:34:40.449 Cache directory changes: Yes, Permanent: Yes
. 2010-06-28 12:34:40.449 DST mode: 1
. 2010-06-28 12:34:40.449 --------------------------------------------------------------------------
. 2010-06-28 12:34:40.449 Looking up host "192.168.0.84"
. 2010-06-28 12:34:40.449 Connecting to 192.168.0.84 port 22
. 2010-06-28 12:34:40.465 Server version: SSH-2.0-OpenSSH_4.3
. 2010-06-28 12:34:40.465 We claim version: SSH-2.0-WinSCP_release_4.0.7
. 2010-06-28 12:34:40.465 Closing connection.
* 2010-06-28 12:34:40.480 (ESshFatal) Network error: Socket operation on non-socket

Thanks

Haven't seen the problem before. Are you able to connect with any other SSH client?

martin wrote:

Haven't seen the problem before. Are you able to connect with any other SSH client?

No I am not able to connect using other clients also, I think the reason could be
because of some firewalls setting on Windows 2003 server. I shall try to figure out as which are the security setting on Windows 2003 server blocking access to use the ssh client service, and then try to connect.