Build and Shoot

So i downloaded and installed the launcher and .75, but when i click on a server it tells me to manually select which version and i select .75 and this error message appears but when i try to go onto a server it says "Couldn't join server.Connection Failed". I have the launcher open and i am logged into the website, please help! I tried using chrome and mozilla.

Check if you have a firewall of some sorts.

I have allowed Build and Shoot and Ace of Spades through my firewall.