Only half of my audio

[StuartR]

Did you remember to create the second track in JK for your bass? You should have 2 mono input tracks in JK.

Thanks for your reply.
I went back to the setup and configure tracks window in JK. There are 2 input tracks as you say, the first one has my AI listed with the word LEFT. Clicking on the 2nd one brings up a dropdown box that allows you to enter the LEFT side of the AI again, or the RIGHT side, or leave it blank and that's all. I have tried entering both left and right, as well as leaving the 2nd one blank, as it explains that if you leave that box blank, the app will automatically create a stereo track. Same results in every configuration.
As far as I can see, these are my only options regarding the input tracks. The " bass guitar " is selected under instrument.
I do know that my old AI worked perfectly this way. 
Again, thanks for your input.

When you create your SECOND input channel inside JK you must Select Input 2 (where your Bass is). To summarize: the first channel should only have your mic and the second channel should only have your Bass.

Thank you very  much! I now see how that works. If I had gone to the instruction window that explains all of that, I would have seen right away how to set it up. Feeling pretty stupid right now. Again, thanks for your help with this!

Glad to help. We've had problems with this ourselves and for some reason the solution wasn't obvious to us at first either!