Down load the session you want to multi play in. Right Click on session go to view dependences. This list will show you how many are on the down load station. Now close window. Click the session drag it to the down load helper,let content do it's search,down load & install. If the session is still missing dependences,Right click on session again,view dependences,now at the bottom right side click view in main list. Scroll down to you see the ones that are on the down load station,drag them to the down load helper, do this tell you get all the dependences. On all Multiplayer session all the assets must be built in or on the DLS so you should not have any un knows. Now ones you got all the dependences, close content manager,close trainz,shout your PC down completely. Restart,start trainz,click on routes,wait few minutes for it to load completely.(if the star is gold at the top left click on it to let you see all the routes,not just your favorites) To the right of the names of the routes is a 0 or a 1 if it's a 1 then that means that a multiplater session is open to join.Now to join you need to click on session of the route,wait a minute or two for the playing session to load, click on it,then click to join. There maybe a massage that you need to add or have some assets converted click yes. The loading may take up to 15 minutes depenning on the side of the route. Any other questions just ask.The server has been down for a week now and likey wont be up tell tomorrow.