thedukewestern
if all else fails upload your session to dropbox so other users can look at your routing via download
A great suggestion so we all can learn...I have been with Cakewalk for a while. Started with Home Studio and continually upgraded (SPLAT Lifer here). When I had that problem (This was before Aux tracks and patch points), no amount of rerouting worked. The bus worked like the mute button was stuck ON. I have not seen it in a while now and only had it happen twice before, but it did happen and no amount of rerouting/changes fixed it until I rerouted the channels feeding it to another bus.
At any rate at least I was able to help even if we did not "fix" the problem, the next time the OP sees this (if there is indeed a next time), there is a quick fix and its back to making music! Which is the main goal for us all!
Pat