ปัญหาเฉพาะ Windows 8 เกี่ยวกับการติดต่อ SQL Server 2012 ด้วย mssql.dll รบกวนผู้รู้ช่วยเหลือครับ

define('DB_TYPE', 'mssql');
define('DB_HOST', 'CRAZY\INTZ');
define('DB_NAME', 'mvc');
define('DB_USER', 'INTz_');
define('DB_PASS', '12345678');

class Database extends PDO{
    
    public function __construct() {
        try {
            $dbh = parent::__construct(DB_TYPE.':host='.DB_HOST.';'.'dbname='.DB_NAME
                            ,DB_USER
                           ,DB_PASS);
        } catch (PDOException $e) {
          echo "Failed to get DB handle: " . $e->getMessage() . "\n";
          exit;
        }
        $stmt = $dbh->prepare("select name from master..sysdatabases where name = db_name()");
        $stmt->execute();
        while ($row = $stmt->fetch()) {
          print_r($row);
        }
        unset($dbh); unset($stmt);
    }

}

            $server = $_POST['server'];
		 $in = trim(" \ ");
		 $instance = $_POST['instance'];
		 $user = $_POST['user'];
		 $password = $_POST['pss'];
		 $db = $_POST['db'];
		 
		// Connect to MSSQL
		if(!$instance){
			$con = $server;
		}
		else{
			$con = $server.$in.$instance;
		}
		$link = mssql_connect($con, $user, $password) or die("Unable Connect Server");
		$conn = mssql_select_db($db,$link) or die("Unable Connect Database");