TOPIC:

WHEN I login and then go to OPEN ttd and join a multiplayer game it says my username is already taken and kicks me.

hi

It appears to be some misconfiguration but, lets try from the beginning:
- Download cliente latest version here ;
- Extract "openttd.exe" and "lang" folder to OpenTTD instalation folder (usually in C:\Program files\OpenTTD). Overwrite them, if necessary;
- Run the game, select BTPRO and enter openttd.btpro.nl website info (Username and Password) in OpenTTD Intro menu (username and password are set separately by community);
- Enter on desired server and hit "Get Token --> Login" button.

And should be all

I problems remains, please contact me on IRC ( Contact Us link on top menu)