NSURLSession - Proxy Settings

Hi, i want to implement a Proxy in my WebView Controller, but i have problems trying to get the response of the URL, i tried almost everything.

I my main doubts are in the definition of the connectionProxyDictionary, my proxy server is an HTTPS server, and this is my code:

func loadAddressURL(url : String){
        /
        /
        var proxyHost : CFString = NSString(string: "https://xxx.xxx.xxx") as CFString
        var proxyPort : CFNumber = NSNumber(int: xxx) as CFNumber
        var proxyEnable : CFNumber = NSNumber(int: 1) as CFNumber      
        /
      
        var proxyDict: [NSObject : AnyObject] = [
            kCFNetworkProxiesHTTPEnable: proxyEnable,
            kCFStreamPropertyHTTPProxyHost: proxyHost,
            kCFStreamPropertyHTTPProxyPort: proxyPort,
            kCFStreamPropertyHTTPSProxyHost: proxyHost,
            kCFStreamPropertyHTTPSProxyPort: proxyPort,
            kCFProxyTypeKey: kCFProxyTypeHTTPS
        ]
      
        var configuration : NSURLSessionConfiguration = NSURLSessionConfiguration.ephemeralSessionConfiguration()
      
        configuration.connectionProxyDictionary = proxyDict
      
        /
        var session : NSURLSession = NSURLSession(configuration: configuration, delegate: self, delegateQueue: NSOperationQueue.mainQueue())
      
        /
        let requestURl = NSURL(string: url)
        let request = NSURLRequest(URL:requestURl!)
      
        /
        var task : NSURLSessionDataTask = session.dataTaskWithRequest(request, completionHandler: {(data: NSData!, response: NSURLResponse!, error: NSError!) -> Void in
            if (error == nil) {
                var myHtmlString = NSString(data: data, encoding: NSUTF8StringEncoding)
                println(response)
                println(myHtmlString)
                self.WebView.loadHTMLString(myHtmlString as! String, baseURL: nil)
            } else {
                println(error)
            }
        })
        task.resume()
    }

the response is Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo=0x1740f1f00 {NSUnderlyingError=0x17405d550 "The operation couldn’t be completed. (kCFErrorDomainCFNetwork error -1001.)", NSErrorFailingURLStringKey=https://www.google.com/, NSErrorFailingURLKey=https://www.google.com/, NSLocalizedDescription=The request timed out.}

Thank you in Advance

Franz