Why is :Play() not working in my touch script??

code:

local event = game.ReplicatedStorage.Touch_Collect.RemoteEvent
local running = false
local sound = game.ReplicatedStorage.SoundMusic.sound
event.OnServerEvent:Connect(function(player)
    if not running then running = true
    local pieces = player.leaderstats:WaitForChild("Pieces")
local coins = player.leaderstats:WaitForChild("Coins")
wait(0.1)
local value = pieces.Value
coins.Value = coins.Value +value
pieces.Value = pieces.Value - value
sound:Play()
wait(5)
running = false
end
    end)