why wont this remote event first to the server?

--- local script----
script.Parent.MouseButton1Click:connect(function()
	game.ReplicatedStorage.RemoteEvent:FireServer(script.Parent.CName, script.Parent.CValue)
end)

--Server--
game.ReplicatedStorage.RemoveEvent.OnServerEvent:connect(function(player, CName, CValue)
	game.Workspace.CNameW = CName.Value
	game.Workspace.CValueW = CValue.Value
end)

ERROR: attempt to index local 'CName' (a nil value)

If CName is an object, you cannot send it through a RemoteEvent since it is an Instance as stated a the bottom of this page. If you do send it, it comes back nil. You would have to send the Name of the object or other property value such as..

Booleans, Numbers, Tables, Vectors, CFrames, ect...

Looking at your code, you likely want... script.Parent.CName.Name and script.Parent.CValue.Value