Unable to connect database using DB in shared web hosting

ini_set('include_path', '~/pear/lib' . PATH_SEPARATOR . ini_get('include_path'));

// From PHP 4.3.0 onwards you can use, especially useful on a shared host
set_include_path('~/pear/lib' . PATH_SEPARATOR . get_include_path());
require_once("Classes/DB.php");
$dbType = "mysql";
$dbUser = "Test";
$dbPass = "test";
$dbServer = "localhost";
$dbName = "Sale";

$db = DB::connect("$dbType://$dbUser:$dbPass@$dbServer/$dbName");
if(DB::isError($db))
{
die("Couldn't connect to database");
}
else
{
$query = "SELECT test FROM Test";
$uResult = $db->query($query);
while ($uRow = $uResult->fetchRow())
{
echo $uRow[0] . " => " . $uRow[1] . "\n";
}
$db->disconnect();
}

?>

I already install pear DB package on shared web host but when i run phpinfo page i get include_path=".:/usr/lib/php:/usr/local/lib/php"
And when i run my page it get the error as unable to connect database.