XPath Builder not working on XML data

XPath Builder not working on XML data

I'm having difficulty getting XPath Builder to properly parse XML data from a URL or from a file.  I've attached the XML file I'm trying to get to work.  XPath Builder shows the data correctly under the data view, but when I try to parse it, it returns nothing. This is an XML file returned from a Zillow API call.  Can you let me know how to get this to work?  

Thanks,
Andy