Resolved Filezilla can't retrieve directory

Hi,
I'm using an HP Notebook with WIN10 64bit. Eset smart security, Filezilla 3.48.1
I am trying to connect to a server to retrieve a directory so that I can edit a website. Filezilla tells me I am logged in but will not retrieve the directory, I get the message below;

Status: Connection established, waiting for welcome message...
Status: Initializing TLS...
Status: Verifying certificate...
Status: TLS connection established.
Status: Logged in
Status: Retrieving directory listing...
Command: PWD
Response: 257 "/" is your current location
Command: TYPE I
Response: 200 TYPE is now 8-bit binary
Command: PASV
Response: 227 Entering Passive Mode (5,77,42,117,253,210)
Command: MLSD
Error: Connection timed out after 20 seconds of inactivity
Error: Failed to retrieve directory listing

This has been an intermittent problem over the last year. I let me retrieve the directory 3 weeks ago, but will not do it now. I have spoken with Eset who had me run some tests and then tried it with the firewall & Anti Virus disabled and still no connection.
Would anybody be able to give me some guidance please? My limited knowledge has been exhausted.

Thank you in advance

 

Hi Tony,

Thank you so much for that link it worked a treat. Which is weird because I've used explicit FTP over TLS plenty of times before and connected successfully
Thanks again