Need help with Permissions

Don't know if you guys saw my old thread, but when ingame on my server, my friend's permissions doesn't work, it says "permission has been denied" or something along that line..

Code:

plugin:

permissions:
system: default
copies: null
groups:
 
Guest:
default: true
info:
prefix: ''
suffix: ''
build: false
inheritance: null
permissions:
- essentials.spawn
- essentials.help
- mywarp.warp.*
- essentials.rules
- essentials.motd
- essentials.afk
- essentials.me
- essentials.list

VIP:
default: false
info:
prefix: ''
suffix: ''
build: true
inheritance:
- Guest
permissions:
- AutoRepair.access
- AutoRepair.repair
- essentials.home
- essentials.sethome
- essentials.compass
- essentials.jump
- essentials.back.*
- essentials.msg
- essentials.mail.*
- craftbook.*

Moderator:
default: false
info:
prefix: ''
suffix: ''
build: true
inheritance:
- VIP
permissions:
- essentials.time
- essentials.item

Admins:
default: false
info:
prefix: ''
suffix: ''
build: true
inheritance: null
permissions:
- essentials.tp
- essentials.tpahere
- '*'

Skrillex:
default: false
info:
prefix: '&3'
suffix: '&4'
build: true
inheritance: null
permissions:
- '*'

Cpt:
default: false
info:
prefix: '&8'
suffix: '&9'
build: true
inheritance: null
permissions:
- '*'

users:
Mynameisskrillex:
group: Skrillex
permissions: null

scpo:
group: VIP
permissions: null

aguyyoudontkno:
group: Admins
permissions: null

iamkewl69:
group: Cpt
permissions: null