My subdomain can not run in internet

[giulia1214]

Thanks for joximu and motokochan.
I will tell my further detail about my situation.In ispCP OMEGA control panel. I clicked "Manage domains" and "add subdomain". After created my subdomain, it showed a list, including "Name,Mount point,Status,Actions"and the Status is "OK". Then I through "filezilla" FTP UPLOAD SOFTWARE,login my FTP space,find the "Mount point", under the path，the system has already created a new "index.html".I download it to my harddisk,and open it,it showes:

"This is the default page This page was generated automatically . Please upload your own index.html file.

If you are the Administrator of this domain, please login here"

I login again, it returned to my ispCP OMEGA control panel. I upload my web files to this path and use my "index.html" to cover the default page.
I know the new subdomain will not active immediately, But now I have waited over 60 hours. And it also can not open,even I returned the "default page",It also shows "your address can not find." I'm puzzled.

Here is my server agency website "http://www.auyama.it/" I am not find and don't know which web server does he use.