title: Getting "Invalid extension descriptor" compiling Flex Native Extensions
body: <p>I'm getting "Invalid extension descriptor" compiling a Flex Native Extension for Android. Everything in the extension.xml file seems to be ok.</p>
  
  <pre><code>&lt;extension xmlns="http://ns.adobe.com/air/extension/3.1"&gt;
      &lt;id&gt;com.samples.NESample&lt;/id&gt;
      &lt;versionNumber&gt;1&lt;/versionNumber&gt;
      &lt;platforms&gt;
          &lt;platform name="Android-ARM"&gt;
              &lt;applicationDeployment&gt;
                  &lt;nativeLibrary&gt;notification.jar&lt;/nativeLibrary&gt;
                  &lt;initializer&gt;com.samples.NESample.NESampleExtension&lt;/initializer&gt;
                  &lt;finalizer&gt;com.samples.NESample.NESampleExtension&lt;/finalizer&gt;
              &lt;/applicationDeployment&gt;
          &lt;/platform&gt;
      &lt;/platforms&gt;
  &lt;/extension&gt;
  </code></pre>
  
  <p>Please, help me tryto figure out what's wrong.</p>
  
  <p>Thanks.</p>