404 Not Found after install on subdomain

Hello

I purchased and downloaded script and installed that. Then installed pack1 of games without any error.
Now when I try to access a game it will show a 404 page not found.
I Installed prs on a subdomain.

http://arcade.meetland.ir

Thanks in advance

http://proarcadescript.com/faq/#tech-notfound

I uploaded htaccess file but because I have another htaccess file in my root folder so Still have problem.
Is there anyway to install this script on a subdomain or it have to install in a site root public_html folder?