simplexml_load_file: failed to open stream: HTTP request failed

I am trying to display rss feeds for this link. http://ift.tt/1p1qC19 But it is showing this error

Warning: simplexml_load_file(http://ift.tt/1p1qC19): failed to open stream: HTTP request failed! in G:\wamp\www\scripts\rss_feeds\demo-1.php on line 48

Here is the code i am using.

$url = 'http://ift.tt/1p1qC19';
$xml = simplexml_load_file($url);       


echo '<pre>';
print_r($xml->channel);
die;

?>