Compilation error when using Media9 package

Question

I am compiling this example from example link

\documentclass{beamer}
\usepackage{media9}

\begin{document}

\begin{frame}{dumb frame}
\dots
\end{frame}

\begin{frame}{frame with sound \includemedia[
  label=my_sound,
  width=1ex, height=1ex, transparent,
  activate=pageopen, deactivate=onclick,
  addresource=sound_sample.mp3,
  flashvars={
    source=sound_sample.mp3
   &autoPlay=true
   &hideBar=true
  },
]{}{APlayer.swf}}
\dots
\end{frame}

\begin{frame}{other frame}
\dots
\end{frame}

\pdfpageattr{/AA <</O <</S/JavaScript/JS (annotRM['my_sound'].activated=false;)>> >>}
\begin{frame}{frame where sound stops}
\dots
\end{frame}

\begin{frame}{another dumb frame}
\dots
\end{frame}

\end{document}

I am using Win7 64bit, Miktex 2.9 TeXworks with pdfLaTex compilation. I keep getting this error

("C:\Program Files\MiKTeX 2.9\tex\latex\beamer\translator\dicts\translator-theo rem-dictionary\translator-theorem-dictionary-English.dict") No file embed_mp3.nav.

LaTeX Font Warning: Font shape `OT1/cmss/m/n' in size <4> not available (Font) size <5> substituted on input line 8.

[1{C:/Users/Administrator/AppData/Local/MiKTeX/2.9/pdftex/config/pdftex.map}] ! Undefined control sequence. \file_get_full_name:nN {APlayer.swf}\l_mix_file_tl

l.22 \end{frame}

The log file is saved here (as it exceeded the word limit in the question)

I can successfully embed wav file using package multimedia using code

\begin{center}
\movie[label=show,
start=0s,height = 0cm,width = 6cm, showcontrols]{}{media/specific-information-1-of-3.wav} 
\end{center}
\vspace{0.2cm}
\begin{center}
\hyperlinkmovie[play]{show}{\beamerbutton{play}}
\hyperlinkmovie[pause]{show}{\beamerbutton{pause}}
\hyperlinkmovie[resume]{show}{\beamerbutton{resume}}
\hyperlinkmovie[stop]{show}{\beamerbutton{stop}}
\end{center}

But package Media9 never worked and it kept showing the above error message. Thank you.

Answer 1

Hopefully I am not misusing the space for further question again. It is working now. I updated the following packages (though I am sure different settings should require updating different packages)

l3kernel
beamer
media9
l3packages
etoolbox

Thanks, @samcarter @AlexG @Phelype Oleinik and everyone else offerred suggestions. I learned a lot through the process.