One of the main benefits to using ASIO in Band-in-a-Box, is when playing live into the program using a MIDI keyboard while at the same time using a VSTi/DXi synth (like the VSC-DXi) for playback. In that case, using ASIO drivers allows you to hear what you're playing on your keyboard with no latency (this is a problem with 'MME' drivers, because there will be a delay between when you press a note on your MIDI keyboard and when you hear the sound). In your case, it doesn't sound like you have a specific need to use ASIO drivers yet, so if you're not having luck with that setup I wouldn't worry too much about it at this point.

Where are you currently hearing sound from? Are your speakers plugged into the line-out on the back of your computer (realtek), or your uafx? Also, are you sure you are using the VSC-DXi - in the MIDI Driver Setup, 'use DXi synth' checked, and VSC-DXi selected in the DX Window. Using a DXi synth (instead of a 'regular' MIDI output driver like the GS Wavetable) ensures that you will hear both MIDI and audio tracks in perfect sync and from the same sound source.

Andrew
PG Music Inc.