Sometimes Filezilla can be a bit quirky and thows up a `too many connections from this IP address' error

You can do the following to fix the error:

1. If you haven't already create a site manager entry for the server (File > Site Manager > New Site)
2. In the "Transfer Settings" tab Set the Transfer Mode to "passive"
3. Tick the box marked "Limit the Number of Simultaneous connections"
4. Set Max number of connections "8"

If you continue to have problems, you might like to try another FTP client - there are several video tutorials for different FTP clients here, if you would like some other ideas

https://d9clients.com/ftp_videos.php