Ok i had a answer today. But the support doesn't help me.

You don't even connect to the admin user to verify the point.
So much time to have this kind of answer ?

Please can you really help me ?? This is not a permission pb (because even in superadmin i don't have the button edit item).

Can't believe that.

The support leave customers without any help. It's definitely the worst assistance i had until now.
The tickets are useless...

2 or 3 days each times to give me a word that can't help me.

Unacceptable.
If you aren't able to help me, say it and don't waste my time.
It's the only time i buy something in Smart Addons.

Not cordially.