Help to display Rssinclude using Curl

[aonewebdesign]

Sorry not to formely present my self but I'm in need.
I need to insert the following code:

<?php readfile('http://output16.rssinclude.com/output?type=php&id=136641&hash=61b747f31efc47d0a66790b2fe8d8f1b')?>

on my web site it is a rss feed powered by rssinclude
Problem is I am using xtreemhost.com for my hosting and they support php but not this exact code I get an error saying "Warning readfile(): URL file-access is disabled in the server configuration in [file]"
Any way If I want to use Curl code to use this php code what would be the exact curl code needed & where would I place the php code

I was initialy using te following:

<?php

$curl_handle=curl_init();
curl_setopt($curl_handle,CURLOPT_URL,'http://output16.rssinclude.com/output?type=php&id=136641&hash=61b747f31efc47d0a66790b2fe8d8f1b');
curl_exec($curl_handle);
curl_close($curl_handle);

?>

It was working fine. Then I used the code on 6 other sites & it was still working fine for about 3-5 days. Then without warning it just stopped working, It will not display the rssinclude box that I made.

Please help & explain like I was 2 years old the easiest effective way possible. The goal is to display the feed as html & let it update automaticly for purposes of seo & fresh spiderable content.