How to use Java version with IE?

function addUploadFileHtml(index){
	var guid = "" + imageUploader1.getUploadFileGuid(index);
	var fileName = "" + imageUploader1.getUploadFileName(index);

	var h = "<table cellspacing=\"5\"><tbody>";
	h += "<tr>";
	h += "<td class=\"Thumbnail\" align=\"center\" valign=\"middle\">";

	//Add thumbnail control and link it with Image Uploader by its name and GUID.
	var tn = new ThumbnailWriter("Thumbnail" + uniqueId, 96, 96);
	//Copy codebase and version settings from ImageUploaderWriter instance.
	tn.activeXControlCodeBase = iu.activeXControlCodeBase;
	tn.activeXControlVersion = iu.activeXControlVersion;
	tn.javaAppletCodeBase = iu.javaAppletCodeBase;
	tn.javaAppletCached = iu.javaAppletCached;
	tn.javaAppletVersion = iu.javaAppletVersion;

	//NEW CODE
	tn.activeXControlEnabled = iu.activeXControlEnabled ;
	tn.javaAppletEnabled = iu.javaAppletEnabled ;
	//END NEW CODE

	tn.addParam("ParentControlName", "ImageUploader1");
	tn.addParam("Guid", guid);
	tn.addParam("FileName", fileName);
	h += tn.getHtml();

  <b> Exception Details: </b>System.NullReferenceException: Object reference not set to an instance of an object.<br><br>

            <b>Source Error:</b> <br><br>

            <table width=100% bgcolor="#ffffcc">
               <tr>
                  <td>
                      <code><pre>

Line 31: 		Dim sourceFile As HttpPostedFile = Request.Files(&quot;SourceFile_1&quot;)
Line 32: 
<font color=red>Line 33: 		Dim fileName As String = GetSafeFileName(sourceFile.FileName)
</font>Line 34: 		sourceFile.SaveAs(Server.MapPath(galleryPath &amp; fileName))
Line 35: 		</pre></code>

                  </td>
               </tr>
            </table>

            <br>

            <b> Source File: </b> C:\Inetpub\wwwroot_i\admin\imagegallery\uploader\upload.aspx<b> &nbsp;&nbsp; Line: </b> 33
            <br><br>

            <b>Stack Trace:</b> <br><br>

            <table width=100% bgcolor="#ffffcc">
               <tr>
                  <td>
                      <code><pre>

[NullReferenceException: Object reference not set to an instance of an object.]
   ASP.upload_aspx.Page_Load(Object sender, EventArgs e) in C:\Inetpub\wwwroot_i\admin\imagegallery\uploader\upload.aspx:33
   System.Web.UI.Control.OnLoad(EventArgs e) +67
   System.Web.UI.Control.LoadRecursive() +35
   System.Web.UI.Page.ProcessRequestMain() +750
</pre></code>

<%@ Page Language="VB" AutoEventWireup="false" Debug="true" ValidateRequest="false" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Xml" %>

<script runat="server">
	'This variable specifies relative path to the folder, where the gallery with uploaded files is located.
	'Do not forget about the slash in the end of the folder name.
	Private galleryPath As String = "/imagegallery/images/" & Format(DateTime.Today, "MM_dd_yyyy") & "/"

	Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
		'Get the source file and save it to disk. 

		Dim sourceFile As HttpPostedFile = Request.Files("SourceFile_1")

		Dim fileName As String = GetSafeFileName(sourceFile.FileName)
		sourceFile.SaveAs(Server.MapPath(galleryPath & fileName))
		
		Dim thumbnail1File As HttpPostedFile = Request.Files("Thumbnail1_1")
		thumbnail1File.SaveAs(Server.MapPath(galleryPath & "large/" & fileName & ".jpg"))
	End Sub

	'This method verifies whether file with such name already exists 
	'and if so, construct safe filename name (to avoid collision).	
	Private Function GetSafeFileName(ByVal fileName As String) As String
		
		Dim newFileName As String = fileName
		Dim j As Integer = 1
		While (File.Exists(Server.MapPath(galleryPath & newFileName)))
			newFileName = j & "_" & fileName
			j += 1
		End While
		
		Return newFileName
	
	End Function   
</script>