Problem logging in

I installed london2038 after creating an account here, but when logging in to the
server with the same username/password that I am using on these forums, I get
an error message that the information is incorrect.
Can someone help me with this?

Hallo hast du dein launcher patchen lassen rechts unten beim einloggen muss diese nr stehen
Aktuell ist diese version NR b3a42157 2749.0.0.4581

Register on london 2038 website to play - Site and forum accounts is two diffirent accs.

Thanks, and thanks to those who made London2038 possible