Fix Error In Installation Of Joomla

I am receiving an error while accessing aplus hosting.
I need the error fix so script can be properly installed.

The error is:

JError Unable to load Database Driver:MySQL5

var $dbtype = ‘MySQL5’;
var $host = ‘sqlc40.carrierzone.com’;
var $user = ‘privateinfoorg91859819’;
var $db = ‘privateinfo’;
var $dbprefix = ‘jos_’;