Change address of GP2Y0E02B

Hi,
I am trying to change the address of one of my GP2Y0E02B.

I tried the code here on the topic:

But I'm still having issue and receiving ERREUR every time.

I put a stop before Stage 6 so that I can ground the Vpp pin and press a button to continue the execution, the issue is that - doing so - the execution stops after Stage 8 and it continues only if I put Vpp again to 3.3V but it always ends with ERREUR.

Do you think you can help me with a more precise version of that sketch?

thanks!

Mattia