Chestlock with Multiverse not working

Hi, I have two worlds: one PvE and one PvP...
Basically I want people to only have the ability to lock chests in the PvE world. For the PvP world, I do not want to allow players to lock chests... I've tried a number of things and also ran my code through a YAML parser and I can't figure out what I'm doing wrong.

My relevant installed mods are PEX, Chestlock and Multiverse.
I'm running bukkit 1.7.4 R0.3 on W8 64-bit

Here's my permissions.yml:

Code:

groups:
  Pleb:
    default: true
    permissions:
    - permissions.build: true
    - bukkit.command.tell
    - bukkit.command.me
    - bukkit.command.help
    - bukkit.command.kill
    - bukkit.command.plugins
    - bukkit.broadcast.user
    - anticheat.system.help
    - essentials.tpa
    - essentials.tpaccept
    - essentials.motd
    - essentials.nick
    - essentials.msg.*
    - essentials.realname
    - essentials.rules
    - essentials.suicide
    - essentials.sethome.multiple.2
    - essentials.sethome
    - essentials.home
    - grieflog.tool
    - multiverse.portal.access.pve
    - multiverse.portal.access.pvp
    worlds:
      PvP:
        permissions:
        - -chestlock.lock
        - chestlock.limit.door.0
        - chestlock.limit.dispencer.0
        - chestlock.limit.furnace.0
        - chestlock.limit.chest.0
      PvE:
        permissions:
        - chestlock.lock
        - chestlock.usekey
        - chestlock.list.chests
        - chestlock.list.doors
        - chestlock.list.clear
        - chestlock.coowner
        - chestlock.free
      PvE_nether:
        permissions:
        - chestlock.lock
        - chestlock.usekey
        - chestlock.list.chests
        - chestlock.list.doors
        - chestlock.list.clear
        - chestlock.coowner
        - chestlock.free
      PvE_the_end:
        permissions:
        - chestlock.lock
        - chestlock.usekey
        - chestlock.list.chests
        - chestlock.list.doors
        - chestlock.list.clear
        - chestlock.coowner
        - chestlock.free
  Fag:
    inheritance:
    - Pleb
    permissions:
    - bukkit.command.gamemode
    - minecraft.command.gamemode
    - bukkit.command.whitelist.*
    - anticheat.system.*
    - lagg.*
    - essentials.gamemode.*
    - essentials.nick.*
    - essentials.seen.*
    - essentials.backup
    - essentials.ban.*
    - essentials.banip.*
    - essentials.broadcast
    - essentials.socialspy.*
    - essentials.tempban.*
    - essentials.unbanip
    - essentials.ban.notify
    - grieflog.search
    - grieflog.page
    - grieflog.reload
    - grieflog.getwarning.breakair
    - grieflog.tpto
    - OpenInv.*
    - anticheat.system.notice
    worlds:
      PvE:
        permissions:
        - chestlock.*
      PvE_nether:
        permissions:
        - chestlock.*
      PvE_the_end:
        permissions:
        - chestlock.*
      PvP:
        permissions:
        - -chestlock.lock
        - chestlock.limit.chest.0
        - chestlock.limit.furnace.0
        - chestlock.limit.dispencer.0
        - chestlock.limit.door.0
  Jedi:
    inheritance:
    - Fag
    permissions:
    - vanish.standard
    - grieflog.rollback
    - bukkit.command.whitelist.*
    worlds:
      PvP:
        permissions:
        - -chestlock.lock
        - chestlock.limit.chest.0
        - chestlock.limit.furnace.0
        - chestlock.limit.dispencer.0
        - chestlock.limit.door.0
      PvE:
        permissions:
        - chestlock.*
      PvE_nether:
        permissions:
        - chestlock.*
      PvE_the_end:
        permissions:
        - chestlock.*

So, does anybody see what I did wrong?
I read somewhere that the
'- -chestlock.lock' would deny that permission, but I have tried with and without that line and neither seem to work...

Thanks in advance!