How to move uploaded file to a folder on remote server

/// <summary>
     /// Author: Algem mojedo
     /// Date: Aug. 12, 2011
     /// </summary>
     /// <param name="domainName"></param>
     /// <param name="targetRemoteUploadUrl"></param>
     /// <param name="fileName"></param>
     /// <param name="user"></param>
     /// <param name="pswd"></param>
     /// <returns></returns>
     public string Upload(string domainName, string targetRemoteUploadUrl, string fileName, string user, string pswd)
     {
         string result = string.Empty;
         Stream requestStream = null;
         FileStream fileStream = null;
         System.Net.FileWebResponse uploadResponse = null;
         try
         {
             string uriFile = HyperLinkToUrl(targetRemoteUploadUrl) + fileName.Substring((fileName.LastIndexOf("\\")));
             Uri processFile = new Uri(uriFile);

             System.Net.FileWebRequest uploadRequest = (System.Net.FileWebRequest)WebRequest.Create(processFile);

             if (!System.IO.Directory.Exists(targetRemoteUploadUrl))
             {
                  return "Error: " + "Target server/folder not exist...";
             }
             uploadRequest.Method = System.Net.WebRequestMethods.Ftp.UploadFile;

             //Since the FTP you are downloading to is secure, send
             //in user name and password to be able upload the file
             if (user != string.Empty && pswd == string.Empty)
             {
                    return "Error: " + "Password should not empty...";
             }
             if (user == string.Empty && pswd != string.Empty)
             {
                  return "Error: " + "User ID should not empty...";
             }

             if (user != string.Empty && pswd != string.Empty)
             {
                 uploadRequest.Credentials = new NetworkCredential(user, pswd);
                 bool valid = false;
                 PrincipalContext context = new PrincipalContext((ContextType.Domain), domainName);
                 valid = context.ValidateCredentials(user, pswd);
                 if (!valid)
                 {
                     return "Error: " + "Invalid User Id and/or Password...";
                 }
             }
             //UploadFile is not supported through an Http proxy
             //so we disable the proxy for this request.
             uploadRequest.Proxy = null;
             requestStream = uploadRequest.GetRequestStream();
             fileStream = File.Open(fileName, FileMode.Open);
             byte[] buffer = new byte[1024];
             int bytesRead;
             while (true)
             {
                 bytesRead = fileStream.Read(buffer, 0, buffer.Length);
                 if (bytesRead == 0)
                     break;
                 requestStream.Write(buffer, 0, bytesRead);
             }
             //The request stream must be closed before getting
             //the response.
             requestStream.Close();
             uploadResponse = (System.Net.FileWebResponse)uploadRequest.GetResponse();
         }
         catch (UriFormatException ex)
         {
             return "Error: " + ex.Message;
         }
         catch (IOException ex)
         {
             return "Error: " + ex.Message;
         }
         catch (WebException ex)
         {
             return "Error: " + ex.Message;
         }
         finally
         {
             if (uploadResponse != null)
                 uploadResponse.Close();
             if (fileStream != null)
                 fileStream.Close();
             if (requestStream != null)
                 requestStream.Close();

         }
         return string.Empty;
     }

     // Aug. 12, 2011 by Algem Mojedo
     // clalled from Upload
     public string HyperLinkToUrl(string save2File)
     {
         save2File = save2File.ToLower();
         if (!string.IsNullOrEmpty(save2File))
         {
             var reg = new Regex(@"(?                return reg.Replace(save2File, new MatchEvaluator(ConvertUrlsMatchDelegate));
         }
         return save2File;
     }