I need help with Chat Format on bukkit

0 error and the plugin run but it don't work, what is the problem?

Code:

@EventHandlerpublic void chatFormat(AsyncPlayerChatEvent event){Player p = event.getPlayer();if(p.hasPermission("chat.format.member"){event.setFormat(ChatColor.DARK_GRAY + "[" + ChatColor.DARK_GREEN + "MEMBER" + ChatColor.DARK_GRAY + "] " + ChatColor.DARK_GREEN + p.getDisplayName() + ChatColor.DARK_GRAY + ": " + ChatColor.WHITE + event.getMessage();//This will give the player with that permission node that Chat format.}else if(p.hasPermission("chat.format.moderator"){event.setFormat(ChatColor.DARK_GRAY + "[" + ChatColor.RED + "MODERATOR" + ChatColor.DARK_GRAY + "] " + ChatColor.RED + p.getDisplayName() + ChatColor.DARK_GRAY + ": " + ChatColor.WHITE + event.getMessage();//This will give the player with that permission node that Chat format.}else if(p.hasPermission("chat.format.admin"){event.setFormat(ChatColor.DARK_GRAY + "[" + ChatColor.DARK_RED + "ADMIN" + ChatColor.DARK_GRAY + "] " + ChatColor.DARK_RED + p.getDisplayName() + ChatColor.DARK_GRAY + ": " + ChatColor.WHITE + event.getMessage();//This will give the player with that permission node that Chat format.}else{event.setFormat(ChatColor.DARK_GRAY + "[" + ChatColor.GRAY + "UNKNOWN" + ChatColor.DARK_GRAY + "] " + ChatColor.GRAY + p.getDisplayName() + ChatColor.DARK_GRAY + ": " + ChatColor.WHITE + event.getMessage();//If the player has non of the above permission nodes they will have this Chat format.}