Groove Agent SE 4 can't use automation

Hi friends, need your help.
With GASE4, I can’t seem to be able to automate some parameters. I am trying to automate Amp Env Parameters, like Sustain but it simply doesn’t work.

In GASE4, I go in the Amp Panel.
-If I activate Write Automation and start playing with the Amp Envelope, the sound is changing but nothing is recorded.
-So I right-clik and select Amp Env Sustain, and select Add to Automation. Now if I activate Write Automation and try to play with the Envelope, nothing is recorded.
-So I tried directly in Cubase, with the Am Env Sustain track but I still can’t automate anything…

I am missing something?

Bump! I´m also wondering about this.