Hello Pekay!
What do you mean with nothing happens? Dynamics don't work or nothing at all works with the second instance?
Did you enable Vel Xfade with CC11 for both Vienna Ensemble instances?
Did you make program and channel settings on the Manual Sound Sets page for both VE instances?
Btw.: These four instruments could easily be handled with one VE instance, but maybe you activated two instances for testing purposes.
Best regards,
Andi
Vienna Symphonic Library