Query Strings and Tables

Im having a problem, my layout works perfectly without query strings, but when I add the code it comes up like this:
http://beta.invalidpixel.com but when it should be like http://www.invalidpixel.com

Im loading the news from a file called feeds.php and the code Im using for the query strings is:

<?php
switch ($HTTP_GET_VARS[page]) {
//Default - case
default:
include "feed.php";
break;

//Habbo - Case
case 'other':
include 'other.php';
break;

}
?>

I cant figure out why when I add that code that it messes up, the right bar disappears completley but when the PHP isnt there, its perfect.

Any ideas?