BPermisisons Help

For some reasons my permissions dont work, this is my groups.yml
groups:
C:
permissions:
- essentials.rules
- essentials.help
- essentials.pay
- essentials.balance
- essentials.tell
- essentials.sell
- essentials.back
- essentials.back.ondeath
- essentials.who
- essentials.afk
- essentials.list
- essentials.msg
- essentials.warp
- essentials.helpop
- essentials.motd
- essentials.spawn
- essentials.sethome
- essentials.home
- buyrank.b
groups: []
meta:
prefix: '&8[&6C-Prisoner&8]'
B:
permissions:
- essentials.rules
- essentials.help
- essentials.pay
- essentials.balance
- essentials.tell
- essentials.sell
- essentials.back
- essentials.back.ondeath
- essentials.who
- essentials.afk
- essentials.list
- essentials.msg
- essentials.warp
- essentials.helpop
- essentials.motd
- essentials.spawn
- essentials.sethome
- essentials.home
- buyrank.a
groups: []
meta:
prefix: '&8[&6B-Prisoner&8]'
A:
permissions:
- essentials.rules
- essentials.help
- essentials.pay
- essentials.balance
- essentials.tell
- essentials.sell
- essentials.back
- essentials.back.ondeath
- essentials.who
- essentials.afk
- essentials.list
- essentials.msg
- essentials.warp
- essentials.helpop
- essentials.motd
- essentials.spawn
- essentials.sethome
- essentials.home
- buyrank.free
groups: []
meta:
prefix: '&8[&6A-Prisoner&8]'
free:
permissions:
- essentials.tpa
- essentials.tpaccept
- essentials.tpa
groups:
- A
meta:
prefix: '&0[&6Free&0]'
guard:
permissions:
- essentials.tp
- essentials.kick
- essentials.ban
- essentials.tpo
groups:
- free
meta:
prefix: '&7[&4&lGuard&7]'
semiwarden:
permissions:
- bpermissions.admin
groups: []
meta:
prefix: '&7[&4Semi&7-&4Warden&7]'
warden:
permissions:
- bpermissions.admin
groups: []
meta:
prefix: '&7[&4Warden&7]'