Looping a <seq>?

I've SMIL 2 code like the following, but it doesn't repeat at all, when played in RealOne on a Windows XP system. Is this a problem of me not reading the specification correctly, or a problem of Real not implementing it correctly?

Do the samples in the specs need to be enhanced?

<par>
  <seq repeatCount="indefinite">
  <img dur="1.0s" src="image1.jpg" region="pix_region" fill="auto"/>
  <img dur="3.0s" src="image2.jpg" region="pix_region" fill="auto"/>
  <img dur="1.0s" src="image3.gif" region="pix_region" fill="auto"/>
  </seq>

  <seq>
  <audio src="AudioFile1.rm" dur="7.5s" repeatCount="2"/>
  <audio src="AudioFile2t.rm" dur="19.0s"/>
  </seq>
 </par>