Im trying to learn how to upload files to an folder, and then show the files from the folder, I can easy upload files to the folder in VS2010 (on the pc) and on the server (Unoeuro) but when i will see the files in the folder, the page load but i get a Blank page, on my pc and on the server, so its the same (error)

Main page

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="show_file.aspx.vb" Inherits="show_file" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <form id="form1" runat="server">
<asp:label runat="server" id="lblMessage" Font-Italic="True" ForeColor="Red" />
  <asp:DataGrid runat="server" id="articleList" Font-Name="Verdana"
      AutoGenerateColumns="False" AlternatingItemStyle-BackColor="#eeeeee"
      HeaderStyle-BackColor="Navy" HeaderStyle-ForeColor="White"
      HeaderStyle-Font-Size="15pt" HeaderStyle-Font-Bold="True"
      <asp:ButtonColumn Text="Delete" ButtonType="PushButton" 
              CommandName="Delete" />
      <asp:HyperLinkColumn DataNavigateUrlField="Name" 
              DataTextField="Name" HeaderText="File Name" />
      <asp:BoundColumn DataField="LastWriteTime" 
              HeaderText="Last Write Time"
              DataFormatString="{0:d}" />
      <asp:BoundColumn DataField="Length" HeaderText="File Size"
                DataFormatString="{0:#,### bytes}" />
Imports System.IO

Partial Class show_file
    Inherits System.Web.UI.Page

    Sub Page_Load(sender As Object, e As EventArgs)
        If Not Page.IsPostBack Then
            Dim dirInfo As New DirectoryInfo(Server.MapPath("~/Upload/"))

            articleList.DataSource = dirInfo.GetFiles("*.*")
        End If
    End Sub

    Sub articleList_ItemDataBound(sender As Object, e As DataGridItemEventArgs)
        ' First, make sure we're NOT dealing with a Header or Footer row
        If e.Item.ItemType <> ListItemType.Header And _
             e.Item.ItemType <> ListItemType.Footer Then
            'Now, reference the Button control that the Delete ButtonColumn 
            'has been rendered to
            Dim deleteButton As Button = e.Item.Cells(0).Controls(0)

            'We can now add the onclick event handler
            deleteButton.Attributes("onclick") = "javascript:return " & _
                       "confirm('Are you sure you want to delete the file " & _
                       DataBinder.Eval(e.Item.DataItem, "Name") & "?')"
        End If
    End Sub

    Sub articleList_DeleteFile(sender As Object, e As DataGridCommandEventArgs)
        'First, get the filename to delete
        Dim fileName As String = articleList.DataKeys(e.Item.ItemIndex)

        lblMessage.Text = "You opted to delete the file " & _
            fileName & ".<br />" & _
            "This file could be deleted by calling: " & _

        'You would want to rebind the Directory's files to the DataGrid after
        'deleting the file...
    End Sub
End Class
Can someone help me !?