A. Your element's color might be set to full transparency. Use the inspector or the Overview to change you element's color transparency, and you should now see your element's name in the routing view.
A. First, check you Trim, Gain and Mute settings.
If thoses settings are correctly set, you might want to check if your bus fullfuils the speaker setup conditions. When using a wrong setup, there is no audio coming out of the bus. if you can't or don't want to change your Speaker positions, you can edit the Speaker Parameters individually for the desiered busses. Check the Speakers Parameters page.