"Verzeichnisinhalt konnte nicht empfangen werden"

Hi folks,

i ran into a problem with my fresh ftp server. I cannot receive the folder infos, regardless of whether i try it via LAN/WAN, plain ftp or ftp with tls. It did run until i created a folder within the share via ftp and deleted it afterwards with extplorer.

Now it looks like this all the time:

Status:    Auflösen der IP-Adresse für xxx.ddnss.de
Status:    Verbinde mit xxx.xxx.xxx.xxx:21...
Status:    Verbindung hergestellt, warte auf Willkommensnachricht...
Status:    Initialisiere TLS...
Status:    Überprüfe Zertifikat...
Status:    TLS-Verbindung hergestellt.
Status:    Verbunden
Status:    Empfange Verzeichnisinhalt...
Befehl:    PWD
Antwort:    257 "/" is the current directory
Befehl:    TYPE I
Antwort:    200 Type set to I
Befehl:    PASV
Antwort:    227 Entering Passive Mode (146,52,19,167,214,102).
Befehl:    MLSD
Fehler:    Zeitüberschreitung der Verbindung nach 20 Sekunden Inaktivität
Fehler:    Verzeichnisinhalt konnte nicht empfangen werden

Do you guys have any ideas?

I forwareded ports 21-22 and 49152-65534 to the NAS and allowed them in the OMV firewall settings as well...

Please letme know if you need further information.

Thank you very much!

Command: USER praxis
Reply: 331 Password required for praxis
Command: PASS *****
Reply: 530 Login incorrect.
Error: Login refused by server

I tried different users including the one user who has write/read privileges for the only share added... Does the user has to have special rights or group membership?

okay, after re-enabling the service it worked until i tried to create another folder. After some cross-reading it looks to me as if there is a problem with the ntfs drive (usb).