Ryorgin

Not sure if this has been asked.. I couldn't find a topic on it.. I have an account with WoW (as I do with this forums obviously).. and if I download the game from the website.. it lets me choose what account to login.. But when I downloaded the game through Steam.. it wont let me put in my login details to login to my account to play in game.. it wants me to make a new account.. Is there any way I can log into my account without having to make a new one via steam?