error and world.yml

The error I get:


2011-04-07 17:40:49 [INFO] Starting minecraft server version Beta 1.4
2011-04-07 17:40:49 [INFO] Loading properties
2011-04-07 17:40:49 [INFO] Starting Minecraft server on *:25565
2011-04-07 17:40:49 [INFO] This server is running Craftbukkit version git-Bukkit-jenkins-dev-CraftBukkit-659 (MC: 1.4)
2011-04-07 17:40:49 [INFO] Preparing level "world"
2011-04-07 17:40:49 [INFO] Preparing start region
2011-04-07 17:40:50 [INFO] 144 recipes
2011-04-07 17:40:50 [INFO] Invalid config file found and converted to proper name/format.
2011-04-07 17:40:50 [INFO] [Permissions] (Phoenix) was Initialized.
2011-04-07 17:40:50 [INFO] [Permissions] version [2.5.5] (Phoenix)  loaded
2011-04-07 17:40:50 [INFO] Done (0,084s)! For help, type "help" or "?"



Configfile:


# System is no longer used, but may become used in the future
# Copies is for multiple-world support
#   Put the name of the world you wish for it to be a clone of, otherwise leave it empty.
#   If this file is for your default world (the one in server.properties) then you must
#   leave copies blank.
#  Example: copies: Derp    -  This will clone the permissions of the world Derp
#
# Make sure to rename this file to the name of the world that is in sever.properties under
# level-name.  So if it is level-name: world  then this should be world.yml and in the
# plugins/Permissions directory (ie. plugins/Permissions/world.yml)
#
# NOTE: Do not use tabs while editing this document.  Use only spaces.  A good way to avoid
# doing this is to use Notepad++ and replace the tab with 4 spaces.
plugin:
    permissions:
        system: default
        copies:

##
# AntiBuild is included with this.  To disable a group from being able to build then
# set the build: flag to false (build: false).  If you want a group to be able to build
# then set it to true.
##
# Groups can contain inheritance.
#   To make a group inherit the permissions from another
#   group simply place the groups name in the "inheritance:" like so:
#
#   Example:
#       inheritance:
#           - Default
##
#   All permissions including the asterisks must be placed in single quotes.
#   like so:
#
#       - 'foo.bar'
#
#   Otherwise errors will happen!
##
#   Globalized Permission settings:
#
#       If a permission contains periods (.) you can denote a globalized parameter:
#
#           - 'foo.*'
#
#       This will allow you to use all general commands.
#
##
#   Single Asterisk denotes all commands:
#
#       - '*'
#   If you give a group this permissions, do not have the group inherit any permissions
#   from other groups.  Any users assigned to this group should NOT be given any additional
#   permissions either.
##
#   To exempt a node use the - prefix like so:
#       - '-foo.bar'
##
#   prefix: and suffix: do not do anything on their own.  You need another outside plugin
#   such as iChat or HeroChat in order for these to do anything.
groups:
    Default:
        default: true
        info:
            prefix: ''
            suffix: ''
            build: false
        inheritance:
        permissions:
            - 'foo.bar'
    Moderator:
        default: false
        info:
            prefix: ''
            suffix: ''
            build: true
        inheritance:
            - Default
        permissions:
            - 'bar.foo'
    Admins:
        default: false
        info:
            prefix: ''
            suffix: ''
            build: true
        inheritance:
        permissions:
            - '*'

##
# Users denote which users are included in which group.
# TheNo1Yeti is in the Admin group
# Herpina is a member of the Moderator group but also has access
# to the herp.derp permissions
# Derpina is a member of the admin group but does not have access
# to the derp.derp permission node
# Users can also have a prefix and suffix as seen with Herpina
##
users:
    zaklampje:
        group: Admins
        permissions: