1/ If you have PPPOE internet connection, you need to restart the router from your default settings.
You will be prompted to enter your ISP PPPOE user ID and password.
2/ In your WAN settings - try to detect your connection automatically or start " RUN WIZARD" in your router.
( Automaticaly detected MTZ values are the best otion, I had MTU 1454, but after automatic detection they changed on 1492, 1492 work with Arma, 1454 no !)
3/ Disable your automatic NTP ( Network Time Protocol) and enter Time and Date maually.
This solved my problem. I fixed this after 2 years of "script and empty lobby " Errors.