Solved Please help PermissionsEx

Help me pls when I type in game any word like "Hello" in game it should says "<(Admin)Zen3515> Hello" but this is what happen "<Zen3515> Hello" pls pls pls help me
This is my FULL-SEVER FILE
<Edit by Moderator: Redacted mediafire url>
I'm not use Eng as main lagnuage
so sorry for my bad English.

Code:

groups:
  Member:
    default: true
    prefix: '&c(Member)&7'
    permissions:
    - modifyworld.*
    - essentials.help
    - essentials.home
    - essentials.motd
    - essentials.rules
    - essentials.sethome
    - thunderdeath.permission
    - treeassist.*
    - dt.user
    - dt.userplus
    - dt.travel
    - dt.ptravel
    - hoverpad.all
    - machinadrill.activate
    - machinadrill.deactivate-own
    - machinabuilder.activate
    - machinabuilder.deactivate-own
    - colorportals.use
    - colorportals.create
    - colorportals.destroy
    - modifyworld.*
    options:
      rank: '1000'
  Moderator:
    prefix: '&0(&1Moderator&0)&7'
    permissions:
    - essentials.tp
    - essentials.tphere
    - wirelessredstone.*
    - thunderdeath.permission
    - portal.portal
    - treeassist.*
    - hoverpad.all
    - dt.user
    - dt.userplus
    - dt.travel
    - dt.ptravel
    - machinadrill.activate
    - machinadrill.deactivate-own
    - machinabuilder.activate
    - machinabuilder.deactivate-own
    - gunsplus.*
    - colorportals.use
    - colorportals.create
    - colorportals.destroy
    - modifyworld.*
    options:
      rank: '900'
  Admins:
    prefix: '&0(&4Admins&0)&7'
    permissions:
    - modifyworld.*
    - '*'
    options:
      rank: '1'
users:
  Zen3515:
    group:
    - Admins
  tomorock:
    group:
    - Moderator
  viplo:
    group:
    - Moderator
  bigybplay:
    group:
    - Moderator
  IIxGriimZz:
    group:
    - Moderator

 

In plugins\ChatManager\config.yml, set enable to true.

 

Thanks you very much
SOLVED !!!!