event i cannot login

Hi, is anyone can help me coz i event cannot connect to the server.
I download winscp version 404 and 356 and follow all the default steps for installing but when i put host name, user and password and i also use SFTP(allow SCP fallback) but after a while it informs that:"Connection has been unxpected closed.Server sent command exit status 0" :oops: Please help me!!!

Please first check the log of the server to see why it disconnects you. Or ask the server administrator.

Thank you so much. However, That is the university server and i try using winscp to connect to it at home. All of my friend can connect to that server by using winscp except me. :( .So i think there's a problem with my laptop.

Whenever i login it says that the connection timed out. ive already tried making an exception for it on the firewall but watever i try doesnt seem to work. the port is 22 im using STFP w/scp fall back. HELP