Cant connect to any Server?.

Hey together im new here, buyed Rust and i love the game, my Brother also buyed it now 2 Days ago, installed and updatet the Game but…nothing, List of all Servers is shown, but he cant connect if he click on the server or doubel or tripple click it, also tryed that he join over Steam in my Games, it doesnt work, also tryed with F1 Console connect to IP, didnt Work. Found some posts with the same problem on the Internet but no answer to this problem, somebody got a idea about this?.

Sorry, its not my nativ speech :slight_smile: