cannot bring up phpmyadmin in browser, cannot link to mysql

[Dave <debiantechquestions@gmx.com>]

On our old server we used to access phpmyadmin via "oursite.com/phpmyadmin"

on the new server we have installed phpmyadmin / php / and sql-server ...

we cannot access phpmyadmin.

also we have not been able to link other programs like wordpress to sql
or phpmyadmin to sql.

DEBIAN 9.04

please advise