I am going to assume that you have the Jam Origin MIDI guitar software.

According to their web page
http://www.jamorigin.com/products/midi-guitar/

you need to use the VST version.

I do not record in BiaB so I will pass on trying to tell you how to record from a VST and let someone who has explain how to do it.

My question is why try this in BiaB? I take the tracks from BiaB and plug them into my DAW, Sonar, and I do all of my MIDI recordings there. Since you have Pro Tools that is where I would record if I were you.

If Pro Tools is not a good for MIDI recording, I have no experience with it so I don't know, and if you have the Windows version of BiaB I would record in RealBand then move everything over to Pro Tools. I am not a heavy user of RealBand so again I will leave the recording explanation to those pros who use it.

BiaB is a fantastic backing track program but it is not a DAW.

I think my wife has started to show the first signs of dementia.
She said she can't remember what she ever saw in me!

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware