404 bad request error when integrating Google Analytic in asp.net - asp.net

Question

I am integrating Google Analytic in asp.net which is giving me error 404 bad request.I am using google anayltics v3 in which https://www.google.com/analytics/feeds/data is obsolute.Thats why i am using https://www.googleapis.com/analytics/v2.4/data but again 404 error on this line
string result = webClient.DownloadString(feedUrl);
when i debuged the code
feedUrl= https://www.google.com/analytics/feeds/data?ids=ga:UA-55271282-1&dimensions=ga:pagePath&metrics=ga:pageviews&sort=-ga:pageviews&start-date=2011-06-25&end-date=2011-07-25"
Any help will be appreciated.
protected void Page_Load(object sender, EventArgs e)
{
//-------------- Get Auth Token -------------------
WebClient webClient = new WebClient();
NameValueCollection data = new NameValueCollection();
data.Add("accountType", "GOOGLE");
data.Add("Email", "myEmailAddress");
data.Add("Passwd", "******");//Passwd, not a misspell.
data.Add("service", "analytics");
data.Add("source", "xxxx-xxxx-xx");//Could be anything.
byte[] bytes = webClient.UploadValues("https://www.google.com/accounts/ClientLogin", "POST", data);
string tokens = Encoding.UTF8.GetString(bytes);
string authToken = extractAuthToken(tokens);
//-------------- Get page views -------------------
string feed = "https://www.googleapis.com/analytics/v2.4/data";
//Required:
string ids = "ga:UA-55271282-1";
string metrics = "ga:pageviews";
string startDate = "2011-06-25";
string endDate = "2011-07-25";
//Optional:
string dimensions = "ga:pagePath";
string sort = "-ga:pageviews";
string feedUrl = string.Format("{0}?ids={1}&dimensions={2}&metrics={3}&sort={4}&start-date={5}&end-date={6}",
feed, ids, dimensions, metrics, sort, startDate, endDate);
webClient.Headers.Add("Authorization", "GoogleLogin " + authToken);
string result = webClient.DownloadString(feedUrl);
//-------------- Extract data from xml -------------------
XDocument xml = XDocument.Parse(result);
var ns1 = "{http://www.w3.org/2005/Atom}";
var ns2 = "{http://schemas.google.com/analytics/2009}";
var q = from entry in xml.Descendants()
where entry.Name == ns1 + "entry"
select new
{
PagePath = entry.Element(ns2 + "dimension").Attribute("value").Value,
Views = entry.Element(ns2 + "metric").Attribute("value").Value
};
//-------------- Do something with data -------------------
foreach (var page in q)
{
Debug.WriteLine(page.PagePath + " " + page.Views);
}
}
//-------------- Help Method -------------------
private string extractAuthToken(string data)
{
var tokens = data.Split(new string[] { "\n" }, StringSplitOptions.RemoveEmptyEntries);
return tokens.Where(token => token.StartsWith("Auth=")).Single();
}
}