The Lighting Controller

We've a lot of Briteq Power Pixel 4 fixtures.
They are working in 15CH DMX Mode.
1.CH = Mode, 2.CH=Dimmer , 3.CH=Shutter 4th to 15th CH 4times RGB
Now I try to create a colour flow through 2 of them.
In the pixel menu it's working fine but if I switch on the DMX Button nothing happened. I realized that dimmer is at Zero level.
Gone to Editor - dimmer at full output - DMX Button ON.
Colour flow is working.
I make a scene called PP4_FI and a scene PP4_FO (FI=Fade IN ...)
Put this into a timeline. Used a second trace of the timeline and put in the created PowerPixel4.sce
Switched off Editor and Pixel DMX Button, switched on the Timeline DMX Button.
Nothing happened.
What am I trying to do is to Fade In and Fade Out the Pixel created Flow.
What am I doing wrong?
greetings

Channels 1, 2, 3 must be declared and managed like this: right click on the fixture in Pixels > select "Fixtures properties" > set "First channels" to 3 in section "Shared channels" > click on "Edit" and adjust the channels

Thanxs a lot. I'd forgotten to declare the shared channels cause the german translation of "Shared Channels" is "Edit" and this doesn't make sense.
Thus I don't look to this point. Rest was right.
Now I've changed my german.ini translation.
greetings