Location of subdomain folder in ftp

Hello,

Now I used Plesk for the first time and I don't know if something is not working as it should or I miss something.

I have created a new subdomain, and checked "Use the FTP user account of the main domain" because I don't want separate logins but I can't find the folder where I should upload my files. I logged in to FTP using the same user/pass as I used to login to Plesk CP

In httpdocs there's no new subdomain (I closed and opened the ftp client to avoid conection caching), if I access the subdomain in browser it shows me the default page, as no files ware uploaded.

PS.1. I've been using cPanel for years, I'm not a newbye in hosting stuff.. but can't find the damn folder

PS.2. I couldn't find which Plesk version is this, there's no menu and no notes in the footer or header of the Vista Skin (Plesk Vista Skin) !!!!!

Thank you in advance.