Reaper Issue - Pretty Sure It's Me...

Hi All-
Anybody here who uses Reaper can probably help me on this...
I've managed to get Notion4 pushing all it's audio through Rewire to Reaper, but I only seem to be able to hear what comes out of channels 1/2, but anything that pushes through channels 3/4, 5/6, 7/8, etc. doesn't seem to produce any sound on the Reaper side.
The meter on the Reaper side of this *does* light up, obviously showing a signal getting through. However, it doesn't seem to route from there to the master fader.
Any clue as to what I might be doing wrong?
Thx,
Kurt M. Landre'
https://www.SoundCloud.com/kmlandre
Anybody here who uses Reaper can probably help me on this...
I've managed to get Notion4 pushing all it's audio through Rewire to Reaper, but I only seem to be able to hear what comes out of channels 1/2, but anything that pushes through channels 3/4, 5/6, 7/8, etc. doesn't seem to produce any sound on the Reaper side.
The meter on the Reaper side of this *does* light up, obviously showing a signal getting through. However, it doesn't seem to route from there to the master fader.
Any clue as to what I might be doing wrong?
Thx,
Kurt M. Landre'
https://www.SoundCloud.com/kmlandre