Datastore script wont load and doesnt say anythings wrong. How do i fix?

I have this data store script and it sometimes loadings my tools like its supposed to do and sometimes it doesn't why does this not work

local ds = game:GetService("DataStoreService"):GetDataStore("toolsave555")

game.Players.PlayerAdded:connect(function(plr)
wait(2)
local player = plr.UserId
local data = ds:GetAsync(player)
if data then
for i,v in pairs(data) do

if game.Workspace.axes:FindFirstChild(v) then

local axe = game.Workspace.axes:FindFirstChild(v):Clone()
axe.Parent = plr:WaitForChild("Backpack")

end 

end
end 

end)

game.Players.PlayerRemoving:connect(function(plr)

local player = plr.UserId       
local saved = {}

for i,v in pairs(plr.Backpack:GetChildren()) do
table.insert(saved,v.Name)
end 

ds:SetAsync(player,saved)   
end)