Dear @Shun!
Or You can try the following:
- Enter to the site with E-Mail, which you register on the site, not your game nickname, or Steam nickname;
- Write your E-Mail and password in Notepad, and then copy them one by one paste in the login window, if you not sure that your login and password is correct writing by yourself;
- try to reset your password and log in again;
- Do not use a password or E-Mail any symbols, password must being only characters and numbers.
- Do not use Steam-account, if the game is not bought on it, and on the other account. With the «Steam Family Sharing»to play in multiplayer you can't to connect also; - Your e-mail address from a Steam account must match the email address used when you registered on ETS2MP site. This is a very important point!
- Run Steam, then press Profile> Edit Profile> My private setting and set a to all point is "Public"
-Make sure that you are logging in with the Steam account that was originally attached to that TruckersMP account.
-Change the e-mail address that is attached to your TruckersMP account .An example would be Yahoo!, Gmail or Hotmail.
-Make sure that the @ symbol is being entered correctly. You can copy the symbol in Notepad and then paste it when you are typing your e-mail address. You can also hold ALT and type 6, 4 using numpad to create the symbol or Shift+ 2 in numbers above the letters.
If the problem is solved, let us know.
Greetings