Server join song help?

[YesJelly]

--Quick dirty script for playing sounds to players who join your server.
--Edit to your hearts content. Rewrite it better. I'm not going major release with it.
--See below where to edit/add sounds. If you use CUSTOM ones, make sure your player has them (Forcedownload, etc)
--I used GCFScape for looking at what sounds are available. You may use Google.

local UJoin_Sound_Ver = "[UJoin Sound] - v1 loaded"

if SERVER then
   local UJoin_sounds = { }
--=========EDIT HERE===========================================================
-- *Note* There is a ~255 character limit to one full sound path. Place trailing comma.
   UJoin_sounds = {
        "the song I have put in",

                  }
--==========Don't edit below here (unless you know how) ========================

   MsgN( UJoin_Sound_Ver )
   AddCSLuaFile( "autorun/UJoin_Sounder.lua" )
   function Send_Some_Sound( ply, steamid )
            umsg.Start( "UJoin_sound", ply )
            umsg.String( UJoin_sounds[ math.random( 1, table.getn( UJoin_sounds ) ) ] )
            umsg.End()
   end
   hook.Add("PlayerAuthed", "SendASound", Send_Some_Sound)

else
    MsgN( UJoin_Sound_Ver )

    function UJoin_Play_sound( um )
             UJoin_snd = um:ReadString()
             util.PrecacheSound( UJoin_snd )
             surface.PlaySound( UJoin_snd )
    end
    usermessage.Hook("UJoin_sound", UJoin_Play_sound )
end

So i have put the song link in and put this in lua/autorun what have i done wrong? Because the song dose not work.

[NiandraLades]

"--See below where to edit/add sounds. If you use CUSTOM ones, make sure your player has them (Forcedownload, etc)"

Have you done all this?

[Sat👀shiAaron]

Have you got the song on both server and client?
Is the sound a WAV or MP3 format (Tested and proven 100% to work as WAV)

[soliddzn]

Yea make sure, to add the sound to the server, if not the data won't detect the wav/mp3