Probleme premissions Build

Bonjour, enfaite j'ai un probleme sur permission (groupmanager) pour minecraft, enfaite quand on est [visiteur] j'ai mis : Build:false mais les visiteur on quand meme le droit de construire Oo voici comment j'ai configurer groupmanager:

# Group inheritance
# any inherited groups prefixed with a g: are global groups
# These groups are defined in the globalgroups.yml
# and can be inherited in any worlds groups/users.yml.
#
# Groups without the g: prefix are groups local to this world
# and defined in the this groups.yml file.

groups:
Default:
default: true
permissions: []
inheritance:
- g:essentials_default
- g:bukkit_default
info:
prefix: '&e[Visiteur]'
build: false
suffix: ''
Owner:
default: false
permissions:
- '*'
inheritance: []
info:
prefix: '&c[Admin]'
build: true
suffix: ''
Gendarme:
default: false
permissions: []
inheritance:
- default
- g:essentials_gendarme
- g:bukkit_gendarme
info:
prefix: '&9[Gendarme]'
build: true
suffix: ''
Architecte:
default: false
permissions: []
inheritance:
- default
- g:essentials_moderator
- g:towny_moderator
info:
prefix: '&8[Architecte]'
build: true
suffix: ''
Builder:
default: false
permissions: []
inheritance:
- default
- g:essentials_builder
- g:towny_moderator
info:
prefix: '&2[Paysan]'
build: true
suffix: ''
Moderator:
default: false
permissions: []
inheritance:
- builder
- g:essentials_admin
- g:bukkit_admin
- g:towny_admin
info:
prefix: '&5[Modo]'
build: true
suffix: ''
chef:
default: false
permissions:
- '*'
inheritance: []
info:
prefix: '&4[CHEF]'
build: true
suffix: ''
Citoyen:
default: false
permissions: []
inheritance:
- default
- g:essentials_citoyen
info:
prefix: '&3[Citoyen]'
build: true
suffix: ''

merci.