How to load multiple online scenes in unet multiplayer?

Hi,

I am facing a problem in multiplayer(using by unet) game. I have 4 scenes in my game.

Scene 0 - Menu
Scene 1 - Level 1
Scene 2 - Level 2
Scene 3 - Level 3

I assign menu and Level1 scene in Network Manager.
Offline Scene = Menu Scene
Online Scene = Level1 Scene

When I click on host(as a client) online scene(Level1) loads.
In Level1, I have a button in Scene-1(Level1) to load another scene(Level2).

How to load multiple online scenes in unet multiplayer?