Build in a new world

[Boo]

Code:

function Initialize( Plugin )
    Plugin:SetName( "block" )
    Plugin:SetVersion( 2 )

    PluginManager = cRoot:Get():GetPluginManager()
    PluginManager:AddHook( Plugin, cPluginManager.E_PLUGIN_BLOCK_DIG )

    LOG( "Initialized " .. Plugin:GetName() .. " v." .. Plugin:GetVersion() )
    return true
end

function OnBlockDig( PacketData, Player )
local World = Player:GetWorld()
if (World:GetName() == "WorldAdmins") then
  if Player:GetGroupName().contains("Admins") then
         return true
     else
         return false
    end
end
end

It is dont work. what's wrong?