can't open a new player

i just finish to download the game.
im already install the 1.4 update.
when i try to open a new player in the multi player i got a note in the game that my serial is wrong and i need another one.
(i already tried a 15 diffrents serials and its the same in every single time.)

some one can help me?

Bored to see always the same thing.

Sry but,

Is a joke or you have some brain damage ?

please post in the right section and looks at other threads before post

/moved to help