Fazilla does not connect to remote OMV4 FTP

good morning to all of you
I executed the instructions of @threehappypenguins
Noob Guide to Enabling FTP Server and Using Filezilla Client (Remote Use)?
I have a problem that I would like to solve.
I configured OMV4 of which FTP, Ducker, Router ports.
from local it works both from PC and from Smartphone.
but remotely, from PC it does not connect to the server, but with the Smartphone it is correct
the software that I use from PC Fazilla from Smartphone FTPManager
can you help me ??