There isn't an error in the output, but this script is supposed to mute music but it doesn't?

local enabled = true

function onClick(clicked)
	local backgroundmusic = script.Parent.Parent.Parent:WaitForChild('TopBar'):FindFirstChild('Music')
	
			if enabled == true then
				if backgroundmusic then
					backgroundmusic.Volume = 0
					enabled = false
					script.Parent.Text = 'Music: OFF'
				else
					enabled = false
					script.Parent.Text = 'Music: OFF'
					while wait(1) do
						if script.Parent.Parent.Parent:WaitForChild('TopBar'):FindFirstChild('Music') then
							backgroundmusic.Volume = 0
							break	
					end
				end
							
			if enabled == false then
				if backgroundmusic then
					backgroundmusic.Volume = 0.5
					enabled = true
					script.Parent.Text = "Music: ON"
				else
					enabled = true
					script.Parent.Text = "Music: ON"
					while wait(1) do
						if backgroundmusic then
							backgroundmusic.Volume = 0.5
							break
							end
						end
					end
				end					
			end
		end
	end

script.Parent.MouseButton1Click:connect(onClick)

It works when you click it the first time, but when you try and turn the music back on, it doesn't work. Any ideas why?