Images only partially uploading with HtmlEditorExtender Image Upload

I recently upgraded to the latest version of the Ajax Control Toolkit (July 2013), and am working with the new HtmlEditorExtender with the image upload button added.  For some reason when I upload anything, it does not complely upload the file.  An example would be images, they are only being partially uploaded, causing them to be corrupt and not display correctly.  I have tested this will very small images (around 300k) up to large images that are roughly around 4mb.

Here is my code:

Default.aspx

<%@ Page Title="Home Page" Language="VB" MasterPageFile="~/Site.Master" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %><%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %><asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent"></asp:Content><asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent"><asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server"></asp:ToolkitScriptManager><asp:TextBox ID="TextBox1" runat="server" Height="290px" Width="911px"></asp:TextBox><asp:HtmlEditorExtender ID="TextBox1_HtmlEditorExtender" runat="server"
    Enabled="True" DisplaySourceTab="True" TargetControlID="TextBox1"><Toolbar><asp:InsertImage /></Toolbar></asp:HtmlEditorExtender></asp:Content>

Default.aspx.vb

Imports AjaxControlToolkit

Partial Class _Default
    Inherits System.Web.UI.Page

    Protected Sub TextBox1_HtmlEditorExtender_ImageUploadComplete(sender As Object, e As AjaxControlToolkit.AjaxFileUploadEventArgs) Handles TextBox1_HtmlEditorExtender.ImageUploadComplete

        'Remove any special characters that may create an upload error:
        Dim cleanedUpFilename As String = CleanUpFilename(e.FileName)
        
        Dim imageUpload = DirectCast(sender, AjaxFileUpload)

        'Save the file to the drive
        imageUpload.SaveAs("c:\inetpub\ameriwealth-content\" & cleanedUpFilename)

        ' Generate file path url
        Dim urlToImage As String = "http://localhost:48500/" & cleanedUpFilename

        'Update client with saved image path
        e.PostedUrl = urlToImage

    End Sub

    Private Function CleanUpFilename(inputFileName As String) As String

        Dim workingFilename As String = inputFileName

        workingFilename = HttpUtility.UrlDecode(workingFilename)

        workingFilename = Replace(workingFilename, " ", "-")

        Return workingFilename
        
    End Function

End Class

Steps to recreate the error:

1. Click the image button in the html editor

2. Select any image file

3. Click upload

4. The progress bar never seems to get to 100%, usually says complete at around 90%-97% give or take

I've been VB coding for a ridiculously long time, but I cannot seem to get this thing right.  Probably something simple that I am missing, but the main issue is for some reason, the control is deciding to stop uploading before it is complete.

The code written was adapter from the C# code listed on this blog:

http://stephenwalther.com/archive/2012/05/01/ajax-control-toolkit-may-2012-release

If anyone can point me in the right direction, I would greatly appreciate it.