How to install Aegir on the Froxlor managed server?

I tried to install the Aegir 3 Debian package as described here on a server that is managed with Froxlor. The installation worked without complaint, but when I try to access the installation of aegir, the Drupal installation screen appears.

As the Apache configuration files are managed in my Froxlor, to access the Aegir installation, 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 guess Aegir needs its own Apache configuration files to work, probably, for example, the database variables receive the Apache Aegir configuration files, and they are not. Loaded as Froxlor manages Apache.

Can anyone give me a clue on how to solve this problem?