Windows Firewall

The Windows Firewall is standard with Windows XP and later.  You need to create an "Exception" for Campground Master.

When Campground Master starts up and tries to access the network for the first time (or possibly after any update), you'll see a "Windows Security Alert" window from the firewall.  Click on the "Unblock" button to enable Campground Master.

Unblocking Later -- If you missed the chance to unblock it initially, or need to see if it's being blocked, then you can go into the firewall configuration.  Campground Master should be running when you do this, so the firewall can recognize it.  Have our computer tech perform this procedure if you're not familiar with it.