Why is the Datastore not save? (im confused)

Script

local DataStoreService = game:GetService("DataStoreService")
local currentPackStore = DataStoreService:GetDataStore("CurrentPack")
local repS = game:GetService("ReplicatedStorage")
local updateRemote = repS:FindFirstChild("DataStore")

game.Players.PlayerAdded:Connect(function(player)

local success, err = pcall(function()
    currentPackStore:SetAsync(player, "Animation_Default")
end)

if success then
    print("[Character System]: Load Successful!")
end

local success, currentAnimPack = pcall(function()
    return currentPackStore:GetAsync(player)
end)

if success then
    print("[Character System]: Current Pack is ", currentAnimPack)
end

end)


updateRemote.OnServerEvent:Connect(function(pplayer,Pack)

local success, newPack = pcall(function()
    return currentPackStore:UpdateAsync(pplayer, Pack)
end)

if success then
    print("[Character System]: Save Successful! New Pack is ", newPack)
end
end)

Localscript

local repS = game:GetService("ReplicatedStorage")
local updateRemote = repS:FindFirstChild("DataStore")

script.Parent.TextButton.MouseButton1Click:Connect(function()
    updateRemote:FireServer(script.Parent.TextBox.Text)
end)

so , when i press the button with a text or any String , it should print that its saved , but it doesnt do that for some reason :/