I'm making a music controller and it won't work?

I'm making a music controller. When the track ends another doesn't start playing. It won't resume/pause either and the GetTimePlayed bindable function just returns the same value. I can't figure out how to fix this. It prints the statement in the pause function but not in the restart function.

Code:

-- Put music ids in here
local music = {
    1354485825,
    1493117981,
    2550851246,
    6259395075,
    4254599057
}

-- Specify the wait time between tracks
local wtime = 5

-- Create the sound object
local sound = Instance.new("Sound", game.SoundService)
sound.Name = "Music"

-- Create the random object
local random = Random.new()

-- Setup the PauseTrack listener
script.Listeners.PauseTrack.Event:Connect(function()
    print("Pausing...")
    sound.Playing = false
end)

-- Setup the ResumeTrack listener
script.Listeners.PauseTrack.Event:Connect(function()
    sound.Playing = true
end)

-- Setup the GetTimePlayed function
script.Functions.GetTimePlayed.OnInvoke = function()
    return sound.TimePosition, sound.TimeLength-sound.TimePosition
end

-- Setup the GetId function
script.Functions.GetId.OnInvoke = function()
    return sound.SoundId
end

-- Define the internal play function
function play()
    -- Choose the music at random
    local musicitem = random:NextInteger(1, #music)
    local musicnumid = music[musicitem]
    local musicid = "rbxassetid://"..tostring(musicnumid)
    -- Setup the sound object
    sound.SoundId = musicid
    -- Start the music
    sound.Playing = true
    -- Tell your scripts the music has started
    script.Broadcasters.TrackBegins:Fire()
end

-- Define the internal restart function
function restart()
    print("Restarting...")
    script.Broadcasters.TrackEnds:Fire()
    play()
end

-- Connect the song ending to the internal restart function
sound.Stopped:Connect(restart)

-- Start the music
play()