Mixer doesn't mute or soloing when I want

I have a project where I want to mute one track before export audio. But nothing happen when I mute (or ask for “solo”) I’m using Dorico 6.2 and Noteperformer.

Noteperformer has its own mixer. Click the e in Play mode to open.

Jesper

You saved my day:-) Thanks!!!

Note that you have an option with NP5 (the menu in the top left corner of the NP mixer window, last option) to have each instrument of that mixer into its own fader in Dorico’s mixer.

Perfect!