End-Round-Music Errors

[Piece]

I would like the players to have the possibility to make the music quietly and completely remove the EndRoundMusic. (F1 Menu)
This does not work!
cl_end_round_music.lua:

net.Receive( "_ttt_end_round_music", function( byte, Player )
	local _sound = net.ReadString( );
	surface.PlaySound( _sound );
end )

cl_end_round_ttt.lua:

hook.Add( "TTTSettingsTabs", "Panel", DermaPanel)
local DermaPanel = vgui.Create( 'DFrame' )
DermaPanel:SetSize( 500, 200 ) 
DermaPanel:Center() 
DermaPanel:MakePopup() 

local DermaNumSlider = vgui.Create( "DNumSlider", DermaPanel )
DermaNumSlider:SetPos( 50, 50 )			
DermaNumSlider:SetSize( 300, 100 )		
DermaNumSlider:SetText( "Maximum props" )	
DermaNumSlider:SetMin( 0 )				
DermaNumSlider:SetMax( 3 )				
DermaNumSlider:SetDecimals( 3 )	

CreateClientConVar("ttt_endroundsounds_enable", "1", FCVAR_ARCHIVE)

hook.Add("TTTSettingsTabs", "EndRoundSoundsTTTSettingsTab", function(dtabs)

	local padding = dtabs:GetPadding()

	padding = padding * 2

	local dsettings = vgui.Create("DPanelList", dtabs)
	dsettings:StretchToParent(0,0,padding,0)
	dsettings:EnableVerticalScrollbar(true)
	dsettings:SetPadding(10)
	dsettings:SetSpacing(10)

	do
		local dgui = vgui.Create("DForm", dsettings)
		dgui:SetName("General settings")

		local cb = nil

		dgui:CheckBox("Enable music on round end", "ttt_endroundsounds_enable")

		dsettings:AddItem(dgui)
	end
		
 

sv_end_round_music.lua:

END_OF_ROUND_WIN_INNOCENT_SOUNDS = {
	"endround/tom.mp3",
}
END_OF_ROUND_WIN_TRAITOR_SOUNDS = {
	"endround/michael.mp3",
}
END_OF_ROUND_WIN_TIMELIMIT_SOUNDS = {
	"endround/gun.mp3",
}

END_OF_ROUND_WIN_DEFAULT_SOUND = "round/sound9.mp3";

if ( SERVER ) then
	util.AddNetworkString( "_ttt_end_round_music" );
	
	for k, v in pairs( END_OF_ROUND_WIN_INNOCENT_SOUNDS ) do resource.AddFile( "sound/" .. v ); end
	for k, v in pairs( END_OF_ROUND_WIN_TRAITOR_SOUNDS ) do resource.AddFile( "sound/" .. v ); end
	for k, v in pairs( END_OF_ROUND_WIN_TIMELIMIT_SOUNDS ) do resource.AddFile( "sound/" .. v ); end
	
	local function endofround( wintype )
	
		local _sound = END_OF_ROUND_WIN_DEFAULT_SOUND
		
		if wintype == WIN_INNOCENT then
			_sound = table.Random( END_OF_ROUND_WIN_INNOCENT_SOUNDS );
		elseif wintype == WIN_TRAITOR then
			_sound = table.Random( END_OF_ROUND_WIN_TRAITOR_SOUNDS );
		elseif wintype == WIN_TIMELIMIT then
			_sound = table.Random( END_OF_ROUND_WIN_TIMELIMIT_SOUNDS );
		end
		
		net.Start( "_ttt_end_round_music" );
			net.WriteString( _sound );
		net.Broadcast( );
	end
	hook.Add( "TTTEndRound", "Handymanendofround", endofround )
end

Thank you very much.

[Piece]

Push

[Wheatmap]

I'm no expert. But I think you need to post what the error is / why this isn't behaving as you intended.