I reinstalled Filezilla Server (on Windows 7) and Send2Ebook (on Kobo AuraHD) stopped working. Filezilla Client (same home network and router) still works as before. Windows own FTP client cmd (on the same PC) can also see the directory on the localhost server. Can't remember what the exact settings were when Send2Ebook did work but here are current settings I have on FTP and Koreader:
1) Set theserver as a Passive FTP using my private IP, as Filezilla required (behind NAT?).
2) Didn't enble "FTP over TSL" because I plan to access the server within home network only and through cable connection for everything except ebook trandfer and Send2Ebook only allow "fpt://" format. Online articles say with "FTP over TSL" enabled, the server should be "ftps://" or "ftpes://".
3) In Send2Ebook, I tried the followings:
a, leaving username, password, folder all blank
b, leaving username and password blank, but with folder name
c, filling in the correct username, password and fhold name
After "apply these settings", clicked "Download and remove from server", the popup message reads "Could not get file list for server:
ftp://192.168.1.2, user...."
Restarting Koreader didn't help. Nor did rebooting the device.
I like this feature in Koreader and want to make it work again. I am brand new to FTP, Filezilla and Send2Ebook. Please advise. Thanks.

Update:
Problem solved.
After the host PC of FTP went asleep for a while, I tried to connect again. The Filezilla interface showed user and pass error message. Strange because I didn't change any settings. Before the sleep, the server interface didn't react to Send2Ebook's log in attempts at all.
Going over all the settings in Filezilla one by one, I set a password in Admin Interface Setting, using the same as user password (not sure if that is needed), and downloading and removing was successful.