Problem using Twitter API from C#

Hi All

I am trying to implement a simple Twitter client. I am able to get the status but when I try to Update it I am getting 403 Error from Twitter, here is the code I am using

string uri = "http://twitter.com/statuses/update.xml";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
request.Method = "POST";
           
request.Credentials = new NetworkCredential("username", "password");
request.ContentType = "application/x-www-from-urlencoded";       
string postData = "status=Sample Status";
byte[] encodedData = new ASCIIEncoding().GetBytes(postData);
request.ContentLength = encodedData.Length;
Stream requestStream = request.GetRequestStream();
requestStream.Write(encodedData, 0, encodedData.Length);       

//I am getting error from the next statement

//Error : The remote server returned an error: (403) Forbidden.
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
/*
More code
*/

Please help

Have you proted your updates in Twitter? Here is a c# open source twitter api if you are interested. http://devblog.yedda.com/index.php/2007/05/16/twitter-c-library/

Thanks Shoban, let me check that one.

It is resolved.

But the client name not coming, it is coming as WEB

Great! Client name wont be displayed unless you register the client name with Twitter. Its easy too, You just have to send an email to Twitter with your client details (name, homepage etc).

Twitter is blocked in office. I will post more details about it soon. You can get the details from Twitter API wiki pages. The parameter is "source"