[jQuery] Can't pull xml page from rss feed?

I set up some code like below:

                        $.ajax({
                                type: "GET",
                                url: "sample2.xml",
                                dataType: "xml",
                                success: function(xml) {

And I took the xml source from my rss feed here: 
http://apamsa.blogspot.com/rss.xml

It works fine at parsing through the xml file if I save the xml code
offline, but when I replace the url with the actual url, it doesn't
work anymore. Can you advise where I can start looking to figure out
why it's not working correctly?

Thanks.