thanks prikryl, it worked

but what i couldnt understand, i was able to connect earlier with firewall on, but not after some days, & now only with firewall off..

thanks again

First, try to disable any firewall on the way.

WinSCP log:::::

Session name: "user"@"server.com"
Host name: "server.com" (Port: 22)
User name: "user" (Password: Yes, Key file: No)
Transfer Protocol: SFTP (SCP)
SSH protocol version: 2; Compression: No
Agent forwarding: No; TIS/CryptoCard: No; KI: Yes; GSSAPI: No
Ciphers: aes,blowfish,3des,WARN,des; Ssh2DES: No
Ping type: -, Ping interval: 30 sec; Timeout: 15 sec
SSH Bugs: -,-,-,-,-,-,-,-
SFTP Bugs: -,-,-
Proxy: none
Return code variable: Autodetect; Lookup user groups: Yes
Shell: default, EOL: 0
Local directory: default, Remote directory: home, Update: No, Cache: Yes
Cache directory changes: Yes, Permanent: Yes
Clear aliases: Yes, Unset nat.vars: Yes, Resolve symlinks: Yes
Alias LS: No, Ign LS warn: Yes, Scp1 Comp: No
--------------------------------------------------------------------------
Looking up host "server.com"
Connecting to 111.111.111.111 port 22
Server unexpectedly closed network connection
(ESshFatal) Server unexpectedly closed network connection


i m also not able to connect putty, giving same error. (as putty fatal error). I tried to get the log for putty also, but couldnt.

plz help