Why doesn't this script mute all of the sounds?

Why doesn't this script mute all of the sounds? It is a localscript.

local player = game:GetService("Players").LocalPlayer 
local Hidden = player:WaitForChild("Hidden")
local gui = script.Parent
local Button = script.Parent:WaitForChild("BackFrame").TextButton

Button.Activated:Connect(function()
	if Button.Text == "Mute" then
		Button.Text = "Unmute"
	elseif Button.Text == "Unmute" then
		Button.Text = "Mute"
	end
	if Button.Text == "Unmute" then
		local Children = script.Parent.Parent.Sounds:GetChildren()
		for i, v in pairs(Children) do
			if v:IsA("Sound")then
				v.Volume = 0
			end
		end
	end
	
	if Button.Text == "Mute" then
		local Children = script.Parent.Parent.Sounds:GetChildren()
		for i, v in pairs(Children) do
			if v:IsA("Sound")then
				v.Volume = 1
			end
		end
	end
end)

Try this?

local sound = script.Parent.Parent:GetChildren()
for i = 1, #sound do
    if sound:IsA ("Sound") then
sound.Volume = 0
end
end

Just wingin it here.