Somfy Developer Mode

Dear all

I am desperately trying to get my numerous Somfy products working properly in OH, but I seem to be to stupid to active the developer mode…

I tried to to like described here. So I went to (I live in Switzerland). I then logged into my account. On the overview of my account I cannot see my Tahoma Box (I use a Tahoma DIN Rail).

When I klick to “my products” in my Somfy account, there is a link to Here I can login to my Tahoma box, but I don’t think there is an option to activiate developer mode from here?

Can anybody help me please?