Total newbie here. I'm just trying to get the virtual instruments packaged with the new Cakewalk to record, such as Drum Kit 1. I open a new project, select Basic. I select "Insert" then "Soft Synth" and Drums, and SI-Drum Kit. This adds  a track and assigns a default midi port. I can bring up the kit, select a sample pattern and loop it. I hear it in my headphones, and I see sound bars in the drum and master mix channels. I arm the drum track to record, then hit the main record button (set to o