POST to a FORM using codebehind

 Hello,
Please see this page:
http://karusela.net/2243_%d7%94%d7%a1%d7%9e%d7%95%d7%a8%d7%90%d7%99-%d7%94%d7%90%d7%97%d7%a8%d7%95%d7%9f.aspx
 
I am trying to POST automatically data into the page using that code.
string URLAuth = "http://karusela.net/2243_%d7%94%d7%a1%d7%9e%d7%95%d7%a8%d7%90%d7%99-%d7%94%d7%90%d7%97%d7%a8%d7%95%d7%9f.aspx"; WebClient webClient = new WebClient(); NameValueCollection formData = new NameValueCollection(); formData["ctl00$PersonalizationManager1$WebPartManager1$wp961475462$wp927486962$dvwComment$txtAddedBy"] = "AddedBy"; formData["ctl00$PersonalizationManager1$WebPartManager1$wp961475462$wp927486962$dvwComment$txtTitle" ...