Just installed the multiplayer mod, got all of my profiles set up, seems like I've followed all the guides right. When I start ATSMP from the launcher, I choose Direct-x, Steam shows a box saying "American Truck Simulator is attempting to launch with the optional parameters shown below: '-rdevice dx9'". Once I click OK on this box, ATS launches but multiplayer never does. I don't get an option to log in to multiplayer or chooese a server; I am sent straight to profile selection and therefore single player.
Thanks for your help!