WoW problem loging in

So, I'm trying to play with 2 game at the same time but my second account won't login. Is there a way to make the game launch from the bnet launcher instead of the game itself? Cause I can't login with the launcher just fine but when I try with the game itself it doesnt work.

[lax]

Did you forget to turn off Key Maps while logging in? If not, it might be breaking your password for that window as you type it.
WoW Quicker Start Guide, Part 2: Log in