You'll also need to ensure that the web server is indeed running.
(sorry if this is obvious, but I've done installs where the web server daemon
is switched off until I manually start it, which I prefer.. but I digress.)

Did a google, and found
"The port-number of your $i-th MySQL-server. Default is 3306 (leave
blank). If you use "localhost" as the hostname, MySQL
ignores this port number and connects with the socket, so if you want
to connect to a port different from the default port, use
"127.0.0.1" or the real hostname in
$cfg['Servers'][$i]['host'].
"

http://www.phpmyadmin.net/documentation/