FileZilla no puede conectarse al servidor FTP local y muestra registros de errores en su servidor

FileZilla no puede conectarse al servidor FTP local y muestra registros de errores en su servidor

Estoy ejecutando un servidor FTP en Windows 8.1 Pro con IIS. Funciona bien. Pero hoy, muestra registros de errores que se repiten en bucles de errores como este a continuación. El error principal es sobre Retrieving directory listing.... Mi directorio raíz es D:\. Puedo acceder a él desde Chrome en dispositivos móviles y PC.

Status  :   Connecting to 192.168.1.38:21...
Status  :   Connection established, waiting for welcome message...
Status  :   Insecure server, it does not support FTP over TLS.
Status  :   Logged in
Status  :   Retrieving directory listing...
Command :   PWD
Response:   257 "/" is current directory.
Command :   TYPE I
Response:   200 Type set to I.
Command :   PASV
Response:   227 Entering Passive Mode (171,100,164,212,39,145).
Command :   LIST
Response:   150 Opening BINARY mode data connection.
Error   :   The data connection could not be established: ETIMEDOUT - 
            Connection attempt timed out
Response:   550-Data channel timed out.
Response:   Win32 error: The network connection was aborted by the local 
            system. 
Response:   Error details: Data channel timed out.
Response:   550 End
Error   :   Failed to retrieve directory listing
Status  :   Retrieving directory listing...
Command :   CDUP
Response:   250 CDUP command successful.
Command :   PWD
Response:   257 "/" is current directory.
Command :   PASV
Response:   227 Entering Passive Mode (171,100,164,212,39,169).
Command :   LIST
Response:   150 Opening BINARY mode data connection.
Error   :   The data connection could not be established: ETIMEDOUT - 
            Connection attempt timed out
        .
        .
        .
  going forever

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