You need to tell me what 'cable' you are using.

If you have a usb cable with 2 midi connectors then

1. set that as your midi sound source in Setup under windows Audio Devices (not band in a box yet.

2. Now in Band in a Box setup the Opts - Midi to the cable, Mine is Edirol UM1 Midi.

3. You should be able to click thru now, hit a key and have the sound of your keyboard go into the computer through band in a box and out to the JV1010.

Also any midi that is playing in Band in a Box will go to the jv1010 too.

If you still hear no sound swap the midi cables around and see what happens.

So
1. if you can press the volume button with the led on front panel set to midi and hear sound through earphones the unit works.

2. If you have a standard midi cable you should be able to take midi out of your keyboard and run midi in to the Roland and play it without band in a box to check that.

3. If you did what i said above it will work, unless your midi out is setup wrong on the keyboard. I have both TX and Receive set to Midi channel 1.

John Conley
Musica est vita