Hey Benny,
I saw your video on Youtube. Make sure you have Aria configured correctly. In other words, midi IN and Out must be checked. Doesn't make sense to me, but that is the way they want it set up.
Also, Do you have Garageband, Logic, or another midi program? If so, test it there, if you are getting signal, you know it is still a BIAB issue. I still can't get my EWI to work in BIAB, but I can get it to work in Logic, Garageband, and Sibelius.
Totally stumped on this one, hope you can get it working!
Ed