I am writing expression maps for Vienna Instruments Saxophones and have hit on an odd problem that I cannot work out. The Baritone map is not working - the switches don’t seem to be changing the patches. I have noticed that the little grey preview button, which lets me preview the sound, is greyed out. The Soprano, Alto and Tenor have all worked OK (I haven’t started the Bass yet) and their previews work as expected. I’ve attached a screen shot which may help.