Connect button is greyed out

I downloaded FGunZ today and for some reason the connect button is greyed out.

I've tried making an exception in my firewall, I've given the launcher and the client exe every permission possible, and it still won't connect.

Please help!

Also try running the launcher as administrator, and add an exception to your anti-virus as well (if you use one)

I've tried that, still nothing :/

What anti-virus do you use? Did you add the entire FGunZ folder properly to all exception lists?