Why doesn't this script work?

I have this game I'm trying to remake famous and this save script isn't working?It doesn't save data

Game: http://www.roblox.com/Galactic-Front-ALPHA-TELEPORT-GLITCH-PATCHED-place?id=178549718

Not Working Script:

debounce=false
function Save()
	if debounce==false then
		debounce=true 
		player=game.Players.LocalPlayer
		script.Parent.Text="Saving..."
		player:WaitForDataReady()
		player:SaveNumber("Credit", player.Credit.Value)
		inv=player:FindFirstChild("Inventory")
		for saveinv=1,8 do
			if inv~=nil then
				saveslot=inv:FindFirstChild("Slot"..saveinv)
				if saveslot~=nil then
					player:SaveString(("Slot"..saveinv), saveslot.Value)
				end
			end
		end
		wait(2)
		script.Parent.Text="Save"
		debounce=false
	end
end


script.Parent.MouseButton1Down:connect(Save)

1. I recommend using Data Stores, Data Persistence is outdated, here's the Data Store wiki page
2. You can't access Data Persistence or Data Stores through LocalScripts, you need a normal script.

Here's your revamped script:

local player = script.Parent.Parent.Parent.Parent.Parent.Parent --assuming this button is in a TextButton, in a ScreenGui, this is how to find player
local creditSaves = game:GetService("DataStoreService"):GetDataStore("creditSaves")
local invSaves = game:GetService("DataStoreService"):GetDataStore("invSaves")
local credits = player.Credit.Value
local inv = player:FindFirstChild("Inventory")
local deb = false
script.Parent.MouseButton1Click:connect(function()
if not deb and player:WaitForDataReady() then
deb = true
script.Parent.Text = "Saving..."
creditSaves:SetAsync(player.Name.." credits", credits)
for saveInv = 1, 8 do
if inv then
saveSlot = inv:FindFirstChild("Slot"..saveInv)
if saveSlot then
invSaves:SetAsync(player.Name.." inventory", saveInv)
end
end
end
script.Parent.Text = "Save"
end
end)

That should work.