Please use forum Private Message function to PM me - Konstantin. Inside your PM include:
-the CD key (it`s safe with me:p), but if you like you can omit the last 5 characters:)
-the username you were trying to register with
-Location you bought the game (just company name like Nex Way or Game Stop e.t.c)
And we`ll investigate this with-in 24 hours, and fix this so that you could register.
You can`t right now as this feature was disable. You`ll be able to redeem it on Sunday in the in-game Market. Sorry for the 2 day delay.