got Hunted: The Demon's Forge on Steam

included key for

Hunted Assasin Pack listed (under CD-Key)

Ingame:login to GameSpy successful, Unlock Failed - The code you have entered is invalid

Can this extra content no longer be unlocked

or did I something wrong?
(tried several variations, code given in Steam looks like "XXXX-XXXX-XXXX-XXXX")

Thanks

You're going to have to contact http://support.gamesas.com/eng/products.asp