Members Cannot Build

The members cannot build and here is the groups.yml:

# Group inheritance
#
# Any inherited groups prefixed with a g: are global groups
# and are inherited from the GlobalGroups.yml.
#
# Groups without the g: prefix are groups local to this world
# and are defined in the this groups.yml file.
#
# Local group inheritances define your promotion tree when using 'manpromote/mandemote'

groups:
Default:
default: true
permissions:
- -bukkit.command.kill
- essentials.chat
- essentials.chat.global
- essentials.home
- essentials.moeny
- essentials.pay
- essentials.sethome
- essentials.sign.use
- essentials.spawn
- essentials.warp
- mobarena.user
- modifyworld.chat
inheritance:
- g:essentials_default
- g:bukkit_default
info:
prefix: '&e[&7Default&e] '
build: true
suffix: ''
Owner:
default: false
permissions:
- '*'
inheritance:
- admin
info:
prefix: '&4[&6Owner&4] '
build: true
suffix: ''
Builder:
default: false
permissions: []
inheritance:
- default
- g:essentials_builder
- g:towny_builder
info:
prefix: '&2Builder'
build: true
suffix: ''
Moderator:
default: false
permissions: []
inheritance:
- builder
- g:essentials_moderator
- g:bukkit_moderator
- g:towny_moderator
info:
prefix: '&5[&eMOD&5] '
build: true
suffix: ''
Admin:
default: false
permissions: []
inheritance:
- moderator
- g:essentials_admin
- g:bukkit_admin
- g:towny_admin
info:
prefix: '&c[&8Admin&c] '
build: true
suffix: ''


Any help is appreciated if you want to try and help me the ip: 176.31.153.20