One phpMyAdmin for all virtual servers

I want to set up one central copy of phpMyAdmin under Debian 7

I installed phpMyAdmin via Webmin > System > Software Packages in to the folder /usr/share/phpmyadmin by using this tutorial http://www.jamessimpson.co.uk/virtualmin-install-phpmyadmin-in-central-location/

Problem is that I am not able to access to phpMyAdmin via browser.

When I go to

http://123.123.123.123/phpmyadmin

or

http://some-my-domain.com/phpmyadmin

instead of phpMyAdmin log-in page, I see “Error 404-Page NOT Found” page of my first installed domain/virtual server.

Can somebody help me please?

I found a solution

When I log in as root at http://123.123.123.123/phpmyadmin I can manage all databases