cURL and Feedburner

I am trying to parse an rss feed myself onto my website, I was originally using (successfully on local site) simplexml_load_file() but this is not available on dreamhost, so, went to use cURL, and when I put their code onto my page, it worked fine until I put in the url of my feed, and all of a sudden, it didn’t bring anything back, the main difference I can see is that it is not a true xml file, is there a way to get around this issue?

My feed address I am testing with is:

Thankyou for any help you can give me