create a file with the following content, name it index.html and upload it to your root directory.
Code:
<html>
<head>
<META HTTP-EQUIV="refresh" content="0;URL=http://csn.pcplayground.com/html/index.php">
</head>
<body>
</body>
</html>
that will redirect everyone visiting csn.pcplayground.com to csn.pcplayground.com/html/index.php instantly.
i also put up an example at drawback.pcplayground.com/csnexample.html if you would like to see it in action.