[size=24pt]IF YOU GET A MESSAGE THAT THE SERVER IS OUTDATED THEN YOU NEED TO DOWNGRADE TO THE PREVIOUS VERSION OF MINECRAFT.
[size=18pt]We strongly suggest using MCNostalgia as it is the ONLY legal way of downgrading. It can be found at:
http://www.minecraftforum.net/topic/800346-tool-mcnostalgia-202/
Since so many people post about if the sever is offline or online. READ THIS FIRST.
If you can’t get a connection to the sever there are 5 reasons why you can’t.
FIRST REASON
If you are getting the “server responded with a invalid server key” error message, then you simply need to keep trying. It seems to alternate between “End of stream” and that when you keep trying. This particular error should go away once we stop using a Vanilla server.
SECOND REASON
You are banned. To see if your banned look for your name in our ban list here: http://projectcitybuild.com/banlist.php
THIRD REASON
Minecraft.net is down. To see if it’s down visit this website: http://isminecraftdown.net/
FOURTH REASON
The sever is down. Because we are updating it, fixing it, or something else. Just wait and we will most likely have it up within a few hours. Remember, _andy and _specialk are in Australia, so time differences mean possible long waits. If it is longer WE will probably make a post about it.
FIFTH REASON (last resort)
Your client is having problems. Re-open Minecraft and before you login click ‘Options’ then ‘Force update’. This will remove any mods you have installed which may be stopping you from entering for whatever reason. Try again. If it still won’t work then it is most likely one of the other reasons.
Edit by Kyle8910 for the new 1st reason.