Can't connect to ftp server - Connection refused by server

This may be worth a shot: According to the FileZilla wiki:

By default, FileZilla Client asks the operating system for the machine's IP address and for the number of a free port. This configuration can only work if you are connected to the internet directly without any NAT router, and if you have set your firewall to allow incoming connections on all ports greater than 1024.

If you have a NAT router, you need to tell FileZilla your external IP address in order for active mode connections to work with servers outside your local network:

• If you have a fixed external IP address, you can enter it in FileZilla's configuration dialog.

• If you have a dynamic IP address, you can authorize FileZilla to obtain your external IP address from a special website. This will occur automatically each time FileZilla is started. No information will be submitted to the website (regardless of FileZilla version).

According to the wiki, you should be able to open up Setings, under Connection select the Active Mode tab, and for the Get external IP address from the following URL... field put http://ip.filezilla-project.org/ip.php (Can't vouch for that because it just said 127.0.0.1 when I tried it in the browser, but it may know the difference). I would just try entering in my external IP address manually first.

It seems like this is set on the server. My guess is it limits access based on IP address. So if your address is not on the list the server has, then access is denied. You cannot change this on the client side, unless you can change to an address that is on the list.