yesterday I tried to activate Multisite on my wordpress but it didn't worked
1) I changed the configuration in wp-config to activate Multisite.. and it appeared in the tool the network configuration.
2) I added in wp-config the configuration
3) I changed the old wordpress configuration in htaccess for the new wordpress configuration.
4) I cleaned the cache in my Webbrowser and I logged in again
But the Multisite menu in the drop down menu "Mysite" didn't appeared..
Now, I don't know how it works on Altervista. Maybe Altervista didn't allow Multisite if somebody have only subdomain activated and not bought a domain..
So, I saw that didn't work and restored the two files(wp-config and htaccess) and wanted to ask you.. thx for your help