Thanks to:
Kungpfui & R8 Gordini (some English translation) their help.
1... Start the Autoupdater and this should create 2 files in you GTL installation: 
LOCAL_IP_LOBBY.TXT and 
LOCAL_IP_BACKUP_LOBBY.TXT.
2... Close the Autoupdater and open 
GTL / LOCAL_IP_LOBBY.TXT using 
Notepad or 
WordPad
3... Delete whatever is there and replace it with this line: 
bierbuden18.de and now save.
4... Start your game as normal.
5a... When loaded go to 
Mutiplayer / Lan-Direct IP / Add IP Address / ?????????????
5b... Where I have question marks you need to put one of the 3 following addresses:
game1.bierbuden.de (if you want servers #1 0r #2)
game2.bierbuden.de (if you want servers #3 0r #4)
game3.bierbuden.de (if you want server #5)
6... Now press the 
tick.
7... You should now see your 
UserName & Password screen so press the 
Log In arrow.
8... Wait a short while and if all is well the server you require will show.
You may have to try this more than once but it should work. If it doesn't then try switching your PC off for 30 secs to 2 mins and when rebooted try again.
If you cannot access the 
online files then try this: Open the file 
C:\windows\system32\drivers\etc\hosts with the 
WordPad or 
Notepad and add the following line:
81.3.59.61 www.gtl-server.net
Now save the file. You will need to restart your game 
Good luck and hope to see you real soon!!
Gee-Deeman  
 PS. Thanks to our great Admin for keeping the Bude rolling along!!
PS. Thanks to our great Admin for keeping the Bude rolling along!!