[support] Error installing Drupal 7

[Massimiliano Marini]

Hi all,

This is my configuration in settings.php

$databases = array(
  'driver' => 'pgsql',
  'database' => 'drupal7',
  'username' => 'postgres',
  'password' => 'drupal','
  host' => 'localhost',
);
$db_prefix = '';

This is the error messag:

"In your ./sites/default/settings.php file you have configured Drupal
to use a  server, however your PHP installation currently does not
support this database type."

But Drupal 5.x and Drupal 6.x works without problems.

Where is the problem?

-- 
Massimiliano Marini - http://www.linuxtime.it/massimilianomarini/
"It's easier to invent the future than to predict it." -- Alan Kay