Bukkit

What is the issue?

Please provide any additional information below.

Hello, I have just installed this and have got it successfully running, on one world....
If i try and enter another world or login on another world other than "world" (yes I've got the worlds enabled in config)
I get and error on console that says
"Could not Pass event join Event" when i try to log on on any other world than "world"
"Could not Pass event switch world event" when I teleport between worlds.
As a result of this error it seems to be canceling out the motd for that world and shoes nothing were the motd should be...

Config Below:

############################################################
# +------------------------------------------------------+ #
# |                       WorldMOTD                      | #
# +------------------------------------------------------+ #
############################################################

#Config version - 0.3
#Developed by Kenny Williams | exload
#Website: http://mcacraft.com/
#Forums: http://forums.mcacraft.com/
#YouTube: http://www.youtube.com/mrcomputeranswers
#Questions, comments, or bugs, email me: [email protected]

#Do NOT mess with this. It WILL break the plugin.
config-version: 0.3

auto-update:
  #Should the Auto-Update feature be used?
  enable: true
  #If command-confirm is set to true then the plugin will ask a player with "worldmotd.update.info"
  #to use the command "/wm update" to fetch the latest build from BukkitDev. All updates
  #are applied after a server restart.
  #If false, no message will be sent to the player when they log into the server and updates will
  #commence automatically.
  command-confirm: true

#Mcstats.org reporting. This information is harmless and simply provides me, the
#developer, with useful stats on this plugin.
mcstats: true

# Any setting enabled in the global section will automatically override any MOTD set
# on a per-world basis.
global:
  events:
    switch-world:
      enable: false
      motd:
      - '&5You have just entered a new world!'
      clear-chat: false
    on-player-login:
      enable: false
      motd:
      - '&bWelcome &1%player% &bto &fZone&4Realms!'
      - '&cCurrently Online: &3%playerlist%'
      clear-chat: false

#Which worlds will this plugin be enabled in?
world-enabler:
  - world
  - world_nether
  - zone
  - zone_nether
  - start

#Duplicate the below format for adding another world. Remember the plugin will not
#look for these unless it is in the worlds list. Server color codes are supported.
#%player% = The players display name
#%playerlist% = The players currntly online on the server
#%totalplayers% = An integer amount of online players
#%world% = The world the player is in
#Got a suggestion for another string replacement for me to add? Drop a comment at the BukkitDev page!
world:
  switch-world:
    enable: true
    #MOTD message to be sent when a players switches worlds
    motd:
      - '&bWelcome &6%player% &bto the &6PVP world&b!'
      - '&bHere griefing and raiding is encouraged!'
      - '&bType &6/list &bfor a full list of players online!'
    #Set to true to clear the chat.
    clear-chat: false
  on-player-login:
    #Set to true to send the player this message when he/she logs in. Set to false
    #to cancel this event.
    enable: true
    #The message to be sent to the player when they log in.
    motd:
      - '&bWelcome &1%player% &bto &fZone&4Realms&b!'
      - '&4Currently Online: &6%playerlist%'
    #Set to true to clear the chat.
    clear-chat: false

start:
  switch-world:
    enable: true
    motd:
      - '&bWelcome &6%player% &bto the &6GATE world!'
      - '&bHere you can choose a world by entering a portal, or get help by typing &6/info&b.'
      - '&bType &6/list &bfor a full list of players online!'
    clear-chat: false
  on-player-login:
    enable: true
    motd:
      - '&bWelcome &6%player% &bto &fZone&4Realms!'
      - '&4Currently Online: &6%playerlist%'
    clear-chat: false

  zone:
  switch-world:
    enable: true
    motd:
      - '&bWelcome &6%player% &bto the &6SMP world!'
      - '&bHere you can build a cool house with friends or play some of our awesome minigames!.'
      - '&bType &6/list &bfor a full list of players online!'
    clear-chat: false
  on-player-login:
    enable: true
    motd:
      - '&bWelcome &6%player% &bto &fZone&4Realms!'
      - '&4Currently Online: &6%playerlist%'
    clear-chat: false

Can you please pastebin the error? That screenshot is impossible to read.