bug joining servers

[bUdyflame]

i have been trying to join one of my friend's servers, but Hexxit crashed when i tried to join

info:

-on the launcher, hexxit and all the other modpacks are listed as offline. i can still play them single player, though

-it registers the server and shows the join option when the IP address is typed in

-the error message is: Failed to log in: java.net.SocketException: address family not supported by protocol family: connect