[SOLVED] MarketPlaceService not Detecting if I have gamepass or not?

Hi, so I just got introduced to a thing behind all those petty micro-transactions called MarketPlaceService.

After experimenting with it for a little, I managed to put together this script:

local market = game:GetService("MarketplaceService")
local players = game.Players
local ownsAsset = market.PlayerOwnsAsset
players.PlayerAdded:Connect(function (player)
	local success, doesPlayerOwnAsset = pcall(ownsAsset, market, player, 8642858)
	if doesPlayerOwnAsset then
		print(player.Name .. " owns the laser musket")
	else
		print(player.Name .. " doesn't own the laser musket")
	end
end)

However, I own the asset, and it just keeps saying that I don't own the laser musket.

There are no output (other than the message that says I don't own it) and really nothing else.

Help please!