Issue with executeXPath attributes? Any ideas what Im doing wrong?

I'm trying to use the executeXPath function upon doing a getURL call and am able to get the element text but not the attribute text. I've used the xPath builder for the following XML and all I get is blank info when I run it in Creator.

Here is a sample of the XML I'm attempting to parse:

  <Availability>
 

     
     <BookedStays property_id="1596-60334">
    
        <BookedStay>
       
         <ArrivalDate>
         2014-01-17
         </ArrivalDate>

</Availability>

I can get the ArrivalDate and DepartureDate by using the following:

xmlResponse = getUrl(("http://www.notimportantfordemo.com"),false);

stringdata=xmlResponse.get("responseText");

if(stringdata.contains("<Availability>"))

{

ArrivalDate = stringdata.executeXPath("/Availability/BookedStays/BookedStay/ArrivalDate/text()");

alert (ArrivalDate);

}

HOWEVER when I try to get the attribute for the Property ID using the following:

TempVar = stringdata.executeXPath("/Availability/BookedStays/@property_id");

I am not getting anything.

I've pulled my hair out on this one and have exhausted all options. Any and all help would be appreciated.

-S