I bought a second domain from BV:- www.executivewebstudio.com

I have tried to follow the instructions received when I got the approval of the name.

I have not been able to open the page unless I prefix it with the original domain name, viz:-
http://sitesunion.com/executivewebstudio.com/index.html

I want this to stand alone as a separate domain.

I published the page as:- public_html/executivewebstudio.com
but it does not stand alone.

Where have I gone off the rails please?

I want the index page published as http://www.executivewebstudio.com

Thank you