[O] ox-beamer export, no frames created

[John W. Burroughs]

I have been trying to produce my first presentation using org-mode and
ox-beamer export to create a pdf.  I am not seeing separate frames for
each slide.  For example, using the Beamer Example (12.5.6) from the
org-mode manual, I get the following generated .tex file.

----------------------------------------------------------
% Created 2016-02-22 Mon 12:57
\documentclass[presentation]{beamer}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{fixltx2e}
\usepackage{graphicx}
\usepackage{grffile}
\usepackage{longtable}
\usepackage{wrapfig}
\usepackage{rotating}
\usepackage[normalem]{ulem}
\usepackage{amsmath}
\usepackage{textcomp}
\usepackage{amssymb}
\usepackage{capt-of}
\usepackage{hyperref}
\author{Carsten Dominik}
\date{\today}
\title{Example Presentation}
\hypersetup{
 pdfauthor={Carsten Dominik},
 pdftitle={Example Presentation},
 pdfkeywords={},
 pdfsubject={},
 pdfcreator={Emacs 24.5.2 (Org mode 8.3.3)},
 pdflang={English}}
\begin{document}

\maketitle
\tableofcontents


\section{This is the first structural section}
\label{sec:orgheadline7}

\subsection{Frame 1}
\label{sec:orgheadline4}
\begin{enumerate}
\item Thanks to Eric Fraga\hfill{}\textsc{B\_block}
\label{sec:orgheadline1}
for the first viable Beamer setup in Org
\item Thanks to everyone else:B\(_{\text{block}}\):
\label{sec:orgheadline3}
for contributing to the discussion
\begin{enumerate}
\item This will be formatted as a beamer note\hfill{}\textsc{B\_note}
\label{sec:orgheadline2}
\end{enumerate}
\end{enumerate}
\subsection{Frame 2 (where we will not use columns)}
\label{sec:orgheadline6}
\begin{enumerate}
\item Request
\label{sec:orgheadline5}
Please test this stuff!
\end{enumerate}
\end{document}
----------------------------------------------------------

There are only \subsection{} generated, instead of the \begin{frame}
that is expected.

Any suggestions what might be wrong.

I am using: GNU Emacs 24.5.2
            Org-mode version 8.3.3 (8.3.3-43-g0b97a5-elpa @
            /home/jwb/.emacs.d/elpa/org-20160215/)"
            TeX 3.14159265 (TeX Live 2015/Debian)
            Linux 4.2.0-27-generic #32-Ubuntu SMP Fri Jan 22 04:48:15
            UTC 2016

Many thanks

John
--
+---------------------------------------------+
| John W. Burroughs, P. Eng. | keyid 966D6DD1 |
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