Make sure you're using SFTP (Secure FTP), and not the old and unsecure FTP.
Make sure you use port 1022, many SFTP programs use port 22 as default.
Make sure your username and password are the same as your host emails username and password (unless you have changed your password).
You firewall could be blocking the connection
Make sure you have the server(host) from your host email for host name(+ sftp:// extension first).
Some FTP programs require a path in order to connect. Your path would be in the host mail.
Published on: 04 / 01 / 2018