How to use RemoteEvents, with FireServer?

Hey all! I'm a bit puzzled on how to use :FireServer(). No errors appear in the output, so I'm hoping You guys would be able to help. Thanks!

Local Script:

GUI = script.Parent.Parent.Parent.Parent
Frame = GUI.CitationsDB
Amount = Frame.Citation.Amount
Citee = GUI.Citee
Status = Frame.Status
Player = game.Players.LocalPlayer
Max = 250
RE = game.Workspace:WaitForChild("CitationScript"):WaitForChild("Event")

script.Parent.MouseButton1Down:connect(function()
	if not game.Players:findFirstChild(Citee.Value) then
		Status.Text = "PLAYER NOT FOUND!"
		wait(3)
		Status.Text = ""
	else
		local Victim = game.Players:findFirstChild(Citee.Value)
		if not tonumber(Amount.Text) then
			Status.Text = "INVALID AMOUNT"
			wait(3)
			Status.Text = ""
		else
			if (tonumber(Amount.Text) > Max) then
				Amount.Text = 250
			end
			local Response = game.ReplicatedStorage.Events.rFunction:InvokeServer("Subtract",(tonumber(Amount.Text)),Victim.Name)
			print(Response)
			if Response == "Transaction Completed." then
				Status.Text = "CITATION COMPLETED!"
				wait(3)
				Frame:TweenPosition(UDim2.new(0.5,-160,-1,-100),'Out','Quad',0.35)
				RE:FireServer(Player, Victim.Name, Amount.Parent.Reason.Text)
				wait(1)
				GUI:Destroy()
			else
				Status.Text = "PLAYER DOESN'T HAVE SUFFICIENT FUNDS!"
				wait(3)
				Status.Text = ""
			end
		end
	end
end)

script:

RE = script:WaitForChild("Event")

RE.OnServerEvent:connect(function(Player, Victim, Reason)
	if game.Players:findFirstChild(Victim) then
		local vic = game.Players:findFirstChild(Victim)
		game.Lighting.CitationNotif:clone().Parent = game.Players:findFirstChild(Victim).PlayerGui
		local GGUI = game.Players:findFirstChild(Victim).PlayerGui.CitationNotif
		GGUI.CitationNotif.Title.Text = Player.Name.." is charging you for '"..Reason.."'."
		GGUI.CitationNotif:TweenPosition(UDim2.new(0.5,-160,-0.5,-100),'Out','Quad',0.35)
	end
end)