title: PostgreSql 'PDOException' with message 'could not find driver'
body: <p>pdo is working fine with mysql but with pgsql its giving error <code>'PDOException' with message 'could not find driver'</code> I've installed <code>php5-pgsql</code> package which also includes <code>pdo_pgsql</code> </p>
  
  <p><a href="http://packages.debian.org/sid/php5-pgsql" rel="noreferrer">http://packages.debian.org/sid/php5-pgsql</a></p>
  
  <blockquote>
    <p>This package provides a module for PostgreSQL database connections directly from PHP scripts. It also includes the pdo_pgsql module for use with the PHP Data Object extension.</p>
  </blockquote>
  
  <p>my dsn is <code>pgsql:dbname=DB;host=192.168.0.2</code>
  I am using Ubuntu 10.04</p>