using multiple fileuploads causing crash

Hi,

I have the following function below.

When I only select a file from one of my 3 fileupload controls it works fine but if I select more than one I just get a crash but no error, as in my screen shot. The html is as follows:
<asp:FileUpload ID="fupImage" runat="server"  /> <asp:FileUpload ID="fupImage1" runat="server"  /> <asp:FileUpload ID="fupImage2" runat="server"  /><asp:Button ID="btnSaveImage" runat="server" Text="Upload" />

Protected Sub btnSaveImage_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSaveImage.Click

        Dim fileName As String = ""
        Dim reviewerEmail As String = ""

        Try
            reviewerEmail = HelperGeneral.GetContentByCode(Common.PageLocation.ImageReviewerEmail).WebsiteText

            If fupImage.HasFile Then                
                fileName = Guid.NewGuid.ToString & Path.GetExtension(fupImage.FileName)
                fupImage.SaveAs(HttpContext.Current.Server.MapPath("~/pendingreview/" & fileName))

                'SendingEmail(fileName, reviewerEmail)
            End If

            If fupImage1.HasFile Then
                fileName = Guid.NewGuid.ToString & Path.GetExtension(fupImage1.FileName)
                fupImage1.SaveAs(HttpContext.Current.Server.MapPath("~/pendingreview/" & fileName))

                'SendingEmail(fileName, reviewerEmail)
            End If

            If fupImage2.HasFile Then
                fileName = Guid.NewGuid.ToString & Path.GetExtension(fupImage2.FileName)
                fupImage2.SaveAs(HttpContext.Current.Server.MapPath("~/pendingreview/" & fileName))

                'SendingEmail(fileName, reviewerEmail)
            End If

            JavascriptAlert("Your new image(s) will appear on the site if deemed suitable by our reviewers. Check back soon to see it live.")
        Catch ex As Exception
            Audit("Public website Error - Image submitted for review and errored.", Common.AuditType.Public_Website_Error, "website")
            Throw
        End Try

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error.jpg