Auto update มันอัพตลอดไม่เช็คไฟล์ ช่วยหน่อยครับ พี่ๆ

Public Class Form1
    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        Timer1.Interval = 1000
        ProgressBar1.Value = ProgressBar1.Value + 10 
        If ProgressBar1.Value = 100 Then
            Timer1.Stop()
            My.Computer.Network.DownloadFile("http://upfile.4th.in.th/211samp.exe", Application.StartupPath & "\samp.exe")
            Process.Start(Application.StartupPath & "\samp.exe") 
            Me.Close()
        End If
    End Sub
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Timer1.Start()
    End Sub
End Class