Plugin Help PEX Permissions don't work.

Am I doing something wrong?

Code:

groups:
  default:
    permissions:
   - essentials.help
 - essentials.pay
 - essentials.balancetop
 - essentials.balance.others
 - essentials.balance
 - essentials.afk
 - essentials.getpos
 - essentials.help   
 - essentials.helpop
 - essentials.ignore
 - essentials.list
 - essentials.me
 - essentials.msg
 - essentials.msg.color
 - essentials.msg.url
 - essentials.near
 - essentials.nick
 - essentials.seen
 - essentials.seen.banreason
 - essentials.suicide
 - essentials.whois
 - essentials.clearinventory
 - essentials.enderchest
 - essentials.ping
 - essentials.keepxp
 - essentials.back
 - essentials.delhome
 - essentials.home
 - essentials.home.bed
 - essentials.sethome
 - essentials.sethome.bed
 - essentials.sethome.multiple
 - essentials.tpa
 - essentials.tpaall
 - essentials.tpaccept
 - essentials.tpahere
 - essentials.tpdeny   
 - essentials.warp
 - essentials.warp.list
 - essentials.chat.url
 - essentials.chat.shout
 - essentials.chat.color
 - modifyworld.*
  MVP:
    permissions:
       default: false
    prefix: '&6[&eMVP&6]&7 '
    inheritance:
    - Member
    build: true
    permissions:
    - essentials.help
    - essentials.rules
    - essentials.motd
  Moderator:
    permissions:
    inheritance:
    - MVP
    - Member
    build: true
    permissions:
    - essentials.sethome.multiple.staff
    - essentials.helpop
    - essentials.home.others
    - essentials.nick
    - essentials.warp
    - essentials.warp.list
  Admin:
    permissions:
    inheritance:
    - Mod
    - MVP
    - Member
    build: true
    permissions:
    - essentials.gamemode
    - essentials.give
    - essentials.god
  Owner:
    prefix: '&6[&4Owner&6]&f '
    permissions:
    - '*'