How come no one can hear the sound even though i added RemoteEvent?

- LocalScript
wait(1)
local sound = game:GetService("ReplicatedStorage").Sound
local player = game.Players.LocalPlayer.Character
sound.Parent = player.Radio
local frame = script.Parent:WaitForChild("Frame")
local text = frame.Input.Text
local Format = "http://www.roblox.com/asset/?id=##ID##"

frame:WaitForChild("Play").MouseButton1Click:connect(function()
	local input = tonumber(frame:WaitForChild("Input").Text)
	if input then
	sound.SoundId=Format:gsub("##ID##", tostring(input))
	game.ReplicatedStorage.RemoteEvent:FireServer(sound)
	print("Event Fired")
	end
end)

frame:WaitForChild("Stop").MouseButton1Click:connect(function()
	sound:Stop()
end)

-- Script
game:GetService("ReplicatedStorage").RemoteEvent.OnServerEvent:Connect(function(Player, sound)
	sound:Play()
	print("Event Works")
end)

Line 11 is the problem:

local input = tonumber(frame:WaitForChild("Input").Text)

If the length of the original string, Input.Text, is 0, then you'll get a blank return value.

Simple debug:

if #frame:WaitForChild("Input").Text > 0 and tonumber(frame:WaitForChild("Input").Text) then

To check if the ID is valid and can be loaded, you can view this question's answer.

Once that has passed, check to see if the sound has successfully loaded using IsLoaded...

if sound.IsLoaded then

...and if the condition evaluates to true, play the sound:

sound:Play()