Im not understand this, i go to my account and change the gamepassword.
Now it works fine.
Why it did not say wrong password if it was wrong?
Anyway, now its ok.

Thanks to everyone for helping.

Im 99% sure its right.
When i set wrong passwor, then it say : wrong password.
Now it say : welcome to demo.
In my LFS account it say : Number of available unlocks : 2

Quote from S14 DRIFT :

Are you using the correct password and the like? Perhaps email the devs.

Yes, password is correct, when i set wrong password, then it say "wrong password".

After todays server maintenance my S2 licensed LFS go in demo mode.
I set my usename and password correct, still it says "welcome to LFS demo".

In www.liveforspeed.net my License status is S2 licensed racer.