Pointing domain to subdirectory on seedbox

Hi, I got a domain, and I pointed a subdomain to my seedbox ip.
Now it opens the quickbox menu when I surf to subdomain.mynewdomain.com but I want it to have another root directory, so it points to a folder in my users home directory.

Can someone explain to me how to fix this issue? I tried adding a .conf file in /etc/apache2/sites-enabled and restarted apache2 service but it still opens the quickbox homepage.