[c#] Upload file ftp

[petshopboy]

Salve, ho scritto il seguente codice per uplodare un file in un server ftp. Anche se tutti i parametri sono giusti mi da sempre l'errore "system.net.webexception impossibile effettuare la connessione al server remoto".

Qualcuno mi illumina?

Grazie!

FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://192.168.0.254/");
                 request.Method = WebRequestMethods.Ftp.UploadFile;
                 request.Credentials = new NetworkCredential("nome_utente","password","DOMINIO");
                 StreamReader sourceStream = new StreamReader(openFileDialog1.FileName);
                 byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
                 sourceStream.Close();
                 request.ContentLength = fileContents.Length;

                 Stream requestStream = request.GetRequestStream();
                 requestStream.Write(fileContents, 0, fileContents.Length);
                 requestStream.Close();

                 FtpWebResponse response = (FtpWebResponse)request.GetResponse();

                 MessageBox.Show("Upload File Complete, status {0}", response.StatusDescription);

                 response.Close();