If you are using Windows XP Service Pack 2, you may see the
following dialog box when you try to start the network mode.
If you see this dialog box, please click
"Unblock." Otherwise, you cannot use the network
If you mistakenly clicked clicked "Keep Blocking," please follow
the steps below to unblock YSFLIGHT.
- Open Control Panel -> Security Center
- Click Windows Firewall
- Goto Exceptions tab, and check
fsmain.exe and fsmaino.exe