Script isn't working?

function onPlayerEntered(newPlayer)
    if newPlayer:IsInGroup(508662) then 
        local function Chatted(chatmsg)
        if chatmsg:sub(1,17) == "Give Commands to " then
            local player = chatmsg:sub(18, chatmsg:len())
            if game.Players:FindFirstChild(player) then
                local playername = Instance.new("Tool")
                playername.Parent = game.Workspace
                playername.Name = player 
            end
        elseif chatmsg:sub(1,24) == "Take Commands Away From " then
            local player = chatmsg:sub(25, chatmsg:len())
            if game.Players:FindFirstChild(player) and game.Workspace:FindFirstChild(player) and player:IsA("Tool") then 
                game.Workspace.player:Destroy()
            end
        end
        end
        newPlayer.Chatted:connect(Chatted)
    end
end

game.Players.PlayerAdded:connect(onPlayerEntered)

No idea why it doesn't work.