Problem storing an RSS feed in Flex 4

Question

Hey guys,

I'm having some trouble storing the results of an RSS feed in my Flex 4 app. Here is the variables view, showing the result of the HTTPService which gets the feed:

And here is the code I use to store the result:

public var rssXML:XML;
rssXML = event.result as XML;

But after this code is run, rssXML is still null. What am I doing wrong? Thanks for reading.