Yes, yes. Using ASIO4ALL you set SONAR to ASIO.
But like someone already mentioned: If it's a question of only recording the vocal sketches, I'd use something simple, like Audacity, or if you have full version of Nero, it includes a simple multitrack recorder as well.
The Wave profiler does not work when ASIO is in use. Try it with WDM.
I assume you ave already checked the Windows mixer and audio settings in the control panel?? The Realtek hasn't been accidentally disabled, has it? I mean, if you have, say, used some interface with the laptop and so on...