How to animate the "Wavy Shore" Material?

In vue 8.4 xStream, I have applied the "Wavy Shore" material to Sea object.
But the foam speed is too fast near the coast.
Now I want animate more slowly the foam near the coast.

• What node, and what parameter should I tweak for the animation of the foam, over time?

I tried in the Material: (instead of Water Layer) with "Foam" Layer> Alpha> EditFunction> Foam Node> WaveFoamAgitation: value = 0; as mentioned in the Vue Help:

" Agitation tweak = 0.2 waves move slowly in animations "
" Agitation tweak = 2: waves move quickly in animations "

Also with WindIntensity = 0
Also with WaveFoamChoppiness = 0

But after made a little animation preview nothing changes!
The foam speed is the same as previous...too fast.

• How can I do?

Please response me!
Many thanks in advance!
Horsepower0171.