Changing instrument

Hi, could someone give me some directions about how to change flute to piccolo for a couple of passages in a way that Halion will automatically respond to that change?
What I did is :
1)Put Piccolo into a first flute player in Setup mode
2)Loaded piccolo to empty slot in Halion
3)Picked corresponding channel
4) Entered text in place where the change needs to be using “Instrument change” label
But there is still normal flute playing this passage, not the piccolo…

So how to switch the instrument so I can hear the change?

Thank you for your help!

Did you look at this video? It explains the process.