I have an kurzweil sp4-8 and have managed to get it to play VST's from my laptop.

The sp4-8 has 4 zones to program different sound into. When using a vst in zone one, all is good. But when changing to a different patch in zone 2, it affects zone 1 and the zones play the same patch from the vst.

Any ideas about how to address this, so that different zones play different patches?

Cubase 5