Ouch. This is an old and venerable thread from the earliest days of the JV/XP line. The lilchips site had a couple of good online explanations, but the Roland section of that site has recently vaporized forever.

There has to be some archives somewhere that have this explained, since it has been a problem for virtually everyone at one time or another. Do some searching yourself, I'll see what I can do, and if we find nothing, we'll discuss it here. I may have the lilchips stuff printed out somewhere.

But don't despair. We'll get you what you need.