AVR350 - no bass in Neo6 or any other mode

HI,
i am kind of new to this world. i was using an arcam stereo amp all these time and recently got an arcam AVR 350, configured it to 3.1.

and i dont see my subwoofer active on any modes except Stereo PCM and 5.1 mode from TV DVR.
i was hoping this to work in all Music modes (Neo6 Music, Neo6 Movies etc..) so that all speakers are running with sub woofer..

any ideas ??

thanks
krishna