An Error trying to spawn a Part with FilteringEnabled?

Server Script

local event = Instance.new("RemoteEvent")
event.Parent = game.Workspace.Remotes
event.Name = "PartInvoke"

event.OnServerEvent:connect(function(player)
    p.Parent = game.Workspace
    game.Workspace.Lol.Transparency = 0.5
end)

LocalScript

local p = Instance.new("Part")
p.Name = "Lol"

game.Workspace.Remotes.PartInvoke:FireServer(p)

Error: Workspace.RemoteServer:6: attempt to index global 'p' (a nil value)