Feedburner Issue

This is not exactly wordpress related, but it does have something to do with it in a way.

Alright, so a week ago I was using this code to display my feedburner number as plain text (so I don’t have to use a chicklet):

<?php
//get cool feedburner count
$whaturl="https://api.feedburner.com/awareness/1.0/GetFeedData?uri=forthelose";

//Initialize the Curl session
$ch = curl_init();

//Set curl to return the data instead of printing it to the browser.
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
//Set the URL
curl_setopt($ch, CURLOPT_URL, $whaturl);
//Execute the fetch
$data = curl_exec($ch);
//Close the connection
curl_close($ch);

$xml = new SimpleXMLElement($data);
$fb = $xml->feed->entry['circulation'];

//end get cool feedburner count
?>

It was working good, locally and live. I then sent the theme to my client and he applied it to his site, but his feedburner account is displaying 0. I then checked my copy of the theme on my live test site, and it was displaying 0 aswell. (They’re both pointing at the same feedburner ID).
Since it is known for a fact the number should be in the 1,000s like it was before (chicklets/his account say so), why is it now displaying 0?

Thing is, it was JUST working a week ago, and the code was not tampered with, I think.

Any ideas?