XML : Not Getting any result parsing XML url using SWXMLHash

I need to parse XML Rss feed and use it's data to create tableViews in swift 2, I'm using SWXMLHash to parse XML but I don't know why I get no result !

Is there any problem in the procedure ?

here is my code :

  import SWXMLHash  import Foundation    let url = NSURL(string: "http://razavitv.aqr.ir/index/rss/2")    let task = NSURLSession.sharedSession().dataTaskWithURL(url!) {(data, response, error) in          var xml = SWXMLHash.parse(data!)       // one root element     let count = xml["rss"].all.count         // "title : "     xml["rss"]["channel"]["item"][0]["title"].element!.text!      }    task.resume()