Problem with Gamerz File Explorer 1.20

Hi, this isn’t a really WP plugin but many of yours maybe heard it or use it because the author developed other plugins for WP. However im trying to configure this php script (gamerz file explorer 1.20: https://lesterchan.net/portfolio/programming.php) as instructions i have made a folder in my web space called gfe and upped all its content (https://www.digitalking.it/gfe) then when i go this address i see the error “invalid directory”; i suppose i make some mistakes in the configuration file (you can browse and see the source here: https://www.digitalking.it/fileNice/config.phps), the folder content that i want to display is in https://www.digitalking.it/fileNice (naturally not with the fileNice php script that im temporarily using but with this Gamerz File Explorer 1.20)
Maybe im wrong with the absoulute path (im under TopHost, italian hosting, Linux)

Thanks in advice, Simone