Thank you for contacting us. Sorry to hear about the trouble you are having connecting with FileZilla.
Just as a test, I would try using the Quickconnect
option when you first open FileZilla. This uses the default settings.
If that does not work, I would contact our Live Tech Support
team, so they can review the logs.
I am not sure if you are hosted with us, but this would allow us to see if you are communicating with the server (and if any errors are being logged). If not, the connection is most likely failing before hitting the server.
This is difficult to troubleshoot if you are not connecting to our server, since we do not know how it is is setup (or misconfigured).
If you have any further questions, feel free to post them below.