How to install Aegir on a Froxlor managed server?

I've tried installing the Aegir 3 Debian package as described here on a server managed with Froxlor. The installation worked without problems, but when you try to access the installation of Aegir, the installation screen of Drupal is displayed.

As the Apache configuration files are managed in my Froxlor, to access the installation of Aegir, I configured a domain with Froxlor, pointing to the directory where Aegir is installed (/var/aegir/hostmaster-7.x-3.161). But I do not have a deep knowledge of the Apache configuration, but I suppose that Aegir needs its own Apache configuration files to work because, for example, the configuration files of the Apache Database variables are provided to Aegir by Apache. loaded as Froxlor handles Apache.

Can any one give me a hint on how to solve this problem?