Try running the following test script with your info filled in.
Make sure the user has been added to the DB with ALL PRIVILEGES
Code:
<?php
define('DB_DATABASE', 'igor_wp2011');
define('DB_USER', 'igor_wp2011');
define('DB_PASSWORD', 'Viaduct');
define('DB_HOST', 'localhost');
$mysqli = new mysqli('localhost', DB_USER, DB_PASSWORD, DB_DATABASE);
if ($mysqli->connect_error) {
die('Connect Error (' . $mysqli->connect_errno . ') '
. $mysqli->connect_error);
}
$q = "SHOW TABLES";
$result = $mysqli->query( $q );
while($n = $result->fetch_row( )){
echo $n[0];
echo "\n<br />";
}
$result->free();
$mysqli->close();
?>