Why PA does not show me sinks for surround audio output?

[mengdong.lin@xxxxxxxxx (Lin, Mengdong)]

>> The default sample channels and channel map are commented in
> > /etc/pulse/daemon.conf:
> >
> > ;default-sample-channels =2
> 
> Uncomment that and set it to 6.

I've tried this method but it doesn't work. The card's profile list has not change after I set default-sampel-channel=6.

Thanks
Mengdong