You cannot define a new game because your null level does not allow you to play more than 5 games at once and you are already playing (including your game invitations) 5 games.
You can solve this unpleasant situation by upgrading your membership.
(hide) If you want to greet someone in their native language try our Player's Dictionary, in the "more about languages" link under the flags. (pauloaguia) (show all tips)