ERROR message: Network connection Please Help! exit status 0

I am having trouble accessing the server at our company through the programs Putty or WinSCP. I am using port 22 as the connection, and in the past the SSH has worked, but I cannot even access the server through these programs on our local computers although we still have a connection to the server as a network drive. When I try to get in using WinSCP the error message I get is this: "Connection has been unexpectedly closed. Server sent command exit status 0."

I have tried running like the ssh in debug mode and everything, and it looks like it is searching for the IP address for quite a while.

If anyone has an idea, please let me know, and if you could give some in depth directions about what to do with exactly what I could type into Linux to work on solving this problem that would be extremely helpful

Thanks