Ok Thanks Andi,
I am having some problems getting the trumpets (4 or 6) to switch properly.
I have a solo trumpet on one staff (using Trumpet in C, with sound set VE SY winds > trumpet) this works fine.
I then have 6 trumpets on another staff (using Trumpets in C a6, with sound set VE SY winds > trumpet ensemble). I can't get this to work. I then tried trumpets in C a3, still no luck.
The only way after some experimenting was using Trumpet in Bb for the 6 trumpets to switch correctly.
Thanks,
Dave