Have you tried following the multiplayer tutorials step by step to get a clear understanding of how the multiplayer object works?
After that if you have a question about how a specific part of multiplayer does or doesn't work, ask again.
Some things about your capx - for starters you don't have a button placed for you to run the event to connect to the signalling server. Your max peers is set to 0 so no one else can join your game after your host connects.