ISPConfig shows Apache 2 Test Page powered by CentOS

[onastvar]

ISPConfig shows Apache 2 Test Page powered by CentOS on each of my sites, after re-installation of ISPConfig 2. I would like to know what do I have to check to start troubleshooting.

[onastvar]

Replaced httpd.conf (/etc/httpd/conf/httpd.conf) with a back up httpd.conf I had. My httpd.conf didn't have ispconfig section on the bottom of httpd, and also include was missing

###############ispconfig_log###############
LogFormat "%v||||%b||||%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined_ispconfig
CustomLog "|/root/ispconfig/cronolog --symlink=/var/log/httpd/ispconfig_access_log /var/log/httpd/ispconfig_access_log_%Y_%m_%d" combined_ispconfig

<Directory /var/www/*/web>
    Options +Includes -Indexes
    AllowOverride None
    AllowOverride Indexes AuthConfig Limit FileInfo
    Order allow,deny
    Allow from all
    <Files ~ "^\.ht">
    Deny from all
    </Files>
</Directory>

<Directory /var/www/*/user/*/web>
    Options +Includes -Indexes
    AllowOverride None
    AllowOverride Indexes AuthConfig Limit FileInfo
    Order allow,deny
    Allow from all
    <Files ~ "^\.ht">
    Deny from all
    </Files>
</Directory>

<Directory /var/www/*/cgi-bin>
    Options ExecCGI -Indexes
    AllowOverride None
    AllowOverride Indexes AuthConfig Limit FileInfo
    Order allow,deny
    Allow from all
    <Files ~ "^\.ht">
    Deny from all
    </Files>
</Directory>

Include /etc/httpd/conf/vhosts/Vhosts_ispconfig.conf