I was actually thinking last night that the easiest way to solve this would to change your master keyboard MIDI output channel. Also - your setup may be nowhere near as complex as I'm imagining!
If you check the event list as Nick says to see what channel the BC data is on and make a note of it.
Then check the MIDI output channel of your keyboard by the same method. If the channel is the same as the BC box and you're using a slider or controller on your keyboard to control volume then you'll need to change it (check you keyboard manual for this). Otherwise go to the next step.
Then, as Nick says add a transformer to the clicks and ports page of the environment and cable it between the Input Notes and Input View objects.
In the transformer object set channel = (BC box channel number) and leave the box underneath as thru. Set data byte 1 = 7 and change the box underneath to fix 17. This will send out the BC data on CC17 rather than CC7.
Sorry I didn't think of this in the first place!
M