Still no sound.
I've changed the sound set to special edition. I've loaded the bosendorfer from the Special Edition pre set files but there is no Organ in the Special Edition pre set files so I have loaded the organ manuals and organ pedals pre set from the main collection. The pedals play OK but still the manuals are silent. i can see midi going out of sibelius and I can see the keyboard in the VI player reacting but no sound?
I'm flumuxed.