Hi, please note it has error message saying that you must use Passive FTP when connecting from within a firewall. Active FTP requires our FTP server connects to your PC, which is always blocked by firewall as a kind of intrusion.
Almost all GUI-based FTP client software supports Passive FTP. On Windows platform, it is recommened to install DriveHQ FileManager 3.5 as it is more native to DriveHQ and it has a lot more features than regular FTP.