WCF error 405 : Method not allowed

Sorry could u tell me how to do this ..

I can access the same service by the code below

uri = "http://localhost/Rest/RestServiceImpl.svc/testGEt/orderid/" + Orderid;
string strResult = string.Empty;
// declare httpwebrequet wrt url defined above
HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(uri);
// set method as post
webrequest.Method = "GET";
// set content type
//webrequest.ContentType = “application/x-www-form-urlencoded”;
// declare & read response from service
HttpWebResponse webresponse = (HttpWebResponse)webrequest.GetResponse();
// set utf8 encoding
Encoding enc = System.Text.Encoding.UTF8;

// read response stream from response object
StreamReader loResponseStream = new StreamReader(webresponse.GetResponseStream(), enc);
// read string from stream data
strResult = loResponseStream.ReadToEnd();
// close the stream object
loResponseStream.Close();
// close the response object
webresponse.Close();
// assign the final result to text box
//txtResult.Text = strResult;
return strResult;

Thats also in my localmachine Below is the contract for that


[OperationContract(Name = "testGEt")]

[WebInvoke(Method = "GET", UriTemplate = "testGEt/OrderID/{orderid}", ResponseFormat = WebMessageFormat.Xml, RequestFormat = WebMessageFormat.Xml)]
string testGEt(string orderid);