ServerScriptService is not a valid member of DataModel?

Guys this problem is driving me crazy!

I always get this error when I'm trying to get the ServerScriptService from a LocalScript.

RemoveEvent is in ServerScriptService

Here's the code: It's a LocalScript

script.Parent.MouseButton1Click:connect(function()
	local player = game.Players.LocalPlayer
	local ThePlayerName = script.Parent.Parent:WaitForChild("PlayerNameHere").Text
	game.ServerScriptService:WaitForChild("UnBanPlayer"):FireServer(ThePlayerName)
	print(ThePlayerName.."'s the player name that got sent!")
end)

When I use a LocalScript it gives me that error. But when I use a ServerScript I get the following error:

FireServer can only be called from Client.

What do I do?

I'm getting confused!