curve problem for corsair h150i elite capellix

[malibu303]

As you can see in the screenshot, the first speed set command worked successfully.

All other (curve) commands do not work as described here.
https://github.com/liquidctl/liquidctl/blob/main/docs/corsair-platinum-pro-xt-guide.md#programming-the-fan-speeds

What am I doing wrong? Please help.