HELP me to learn proper way to adjust volume of instrument track

I have drums from Groove agent , this instrument track i send to Group channel and vol of this group does not work. Every time i do this i don’t understand why.

Hi there,
There are many knowledgeable people here, eager to show off said knowledge.
But they’re going to need a bit more information:
What’s your OS?
How are you trying to change the volume?
Do other instruments work OK?
Is it just this project? Or all projects?

And a screenshot would be nice. (On Windows, you can use the Snip tool, save it and drag from the Explorer where you saved it, into the edit box here.)

Hello, WIN11. Everything works ,as always with Cubase - FOR NOW :). So main question how VOl of instrument track goes to OUTPUT, because sending to Group doesnt change VOL. This is what i want to adjust. In fact it must be very simple.