I have an error page set up and when an error occurs the page is not shown. From my webconfig file:

From my Global aspx file:

Sub Application_Error(ByVal sender As Object, ByVal e As EventArgs)
' Code that runs when an unhandled error occurs
' gets the error occured
Dim ex As Exception = Server.GetLastError().GetBaseException()
Try
' checks if the event source is registered
If Not System.Diagnostics.EventLog.SourceExists(".NET Runtime") Then
System.Diagnostics.EventLog.CreateEventSource(".NET Runtime", "Application")
End If

    'log the details of the error occured
    Dim log As New System.Diagnostics.EventLog()
    log.Source = ".NET Runtime"
    log.WriteEntry(\[String\].Format(vbCr & vbLf & vbCr & vbLf & "Application Error" & vbCr & vbLf & vbCr & vbLf + "MESSAGE: {0}" &
                                   vbCr & vbLf + "SOURCE: {1}" & vbCr & vbLf + "FORM: {2}" & vbCr & vbLf + "QUERYSTRING: {3}" &
                                   vbCr & vbLf + "TARGETSITE: {4}" & vbCr & vbLf + "STACKTRACE: {5}" & vbCr
                                   & vbLf, ex.Message, ex.Source, Request.Form.ToString(), Request.QueryString.ToString(), ex.TargetSite, \_
     ex.StackTrace), System.Diagnostics.EventLogEntryType.\[Error\])

    Server.ClearError()
Catch
    ' in case of exception occured in log
    Server.ClearError()
End Try
Server.ClearError()
Response.Redirect(String.Format("Error.aspx?aspxerrorpath={0}", Request.Url.PathAndQuery))

End Sub

What I end up seeing is the master page and the URL shows / Error.aspx, but the error page is not shown with it.