Hello.
I have the same problem with Ableton 7.0.1 as like in this thread:
Noob trying to get Ableton Live! to work with ASIO
But ... I have 2 cards in my pc - Realtek AC97 Audio & Sb Line! Audio [9400] and I want to get Master Channel in this SB card and Cue Channel in Realtek card. It always going (both) only form one card.
Of course, I'm using ASIO 4 All.