Fazer upload de arquivo via FTP com VB.Net

Imports System.Net.Mail
Imports System.Net
Imports System.IO
Public Sub EnviaFtp(ByVal Arquivo As String, ByVal SiteFTp As String, ByVal Usuario As String, ByVal Senha As String)
     Try
         Dim clsRequest As System.Net.FtpWebRequest = DirectCast(System.Net.WebRequest.Create(SiteFTp & "/" & System.IO.Path.GetFileName(Arquivo)), System.Net.FtpWebRequest)
         clsRequest.Credentials = New System.Net.NetworkCredential(Usuario, Senha)
         clsRequest.Method = System.Net.WebRequestMethods.Ftp.DownloadFile

         ' Lê o arquivo local
         Dim bFile() As Byte = System.IO.File.ReadAllBytes(Arquivo)

         ' Escreve no destino
         Dim clsStream As System.IO.Stream = clsRequest.GetRequestStream()
        clsStream.Write(bFile, 0, bFile.Length)
        clsStream.Close()
         clsStream.Dispose()
     Catch ex As Exception
          'messagebox.show("Ocorreu um erro" & ex.message, "Erro")

      End Try
End Sub