Bukkit

I have a problem, my config is set like that:

  prison,169,45,61:
    redstone: false
    owner: Nathanasiou
    text:
    - '@A'
    - $10000
    - ?/#pex user <name> group set B prison
    - /#bc &6&l<name> &r&ahas been ranked up to &4&lB&r&a on the prison world!
    - '-'
    active: true
    cooldowns: {}

But if someone on the A rank with the needed money click on the sign it tells "That sign isnt allowed to socialise with ppl like you"

Whats going?

Im using spigot-1.7.10-SNAPSHOT-b1657 and the lastest version.

You will need to use a different rank name, or give them a permission and use that instead, as it is associating @A as a target selector (like @p and @e), instead of a group name. Assign that group a permission starting with a letter after P, like Q, R, or anything else, and see if that works. Using the @ symbol with commandsigns is tricky at best, in any situation.