Essentials Error Need Help

Hey Guys , iZombies Here

Ive Been Having Problems With Essentials And I Figured I Should Post This Up To Get Some Help .
The Problem Im Having Is When I Enter Permissions My Preifx Dosen't Show , But When I Take The Permissions Out My Prefix Appears . I Know Most Of You Would Say Don't Have Permissions Then , But I Need Permissions For My Groups .

I Am Using Essentials
Here Is My Group And User YML File
User :
users:
iZombies:
subgroups: []
permissions: []
group: Owner
no1monkeypolice:
subgroups: []
permissions: []
group: Admin
BamItsSam:
subgroups: []
permissions: []
group: Admin
Rhys2hip9:
subgroups: []
permissions: []
group: Admin
iggy5678:
subgroups: []
permissions: []
group: Builder
fridaysjam:
subgroups: []
permissions: []
group: Admin

Group:
groups:
Default:
default: true
permissions:
- -bukkit.command.kill
inheritance:
- g:essentials_default
- g:bukkit_default
info:
prefix: '&e'
build: false
suffix: ''
Builder:
default: false
permissions: []
inheritance:
- default
- g:essentials_builder
- g:towny_moderator
info:
prefix: '&b[Builder]'
build: true
suffix: ''
Moderator:
default: false
permissions: []
inheritance:
- builder
- g:essentials_moderator
- g:bukkit_moderator
- g:towny_moderator
info:
prefix: '&5'
build: true
suffix: ''
Admin:
default: false
permissions: []
inheritance:
- moderator
- g:essentials_admin
- g:bukkit_admin
- g:towny_admin
info:
prefix: '&4[Admin]'
build: true
suffix: ''
Owner:
default: false
permissions:
- '*'
inheritance:
- admin
info:
prefix: '&5[Owner]'
build: true
suffix: ''