Bukkit

What steps will reproduce the problem?
1.place sign with the following content
        [BlockParty]
    join
    <arenaName>

2.right or left click on the sign (Right or Left?)
3.Join game and have fun!

What is the expected output? What do you see instead?
It is supposed to join the game, but instead it does nothing, nothing in-game or in the console

What version of the product are you using?
I am using Bukkit 1.7.9-R0.2 Build #3090/Indev 0.5

Do you have an error log of what happened?
No - N/A

Please provide any additional information below.
...I have None

Update to messages to tell you arena is not enabled in 0.7.5 release. Please validate latest and let us know.