title: TFS 2010 - Custom Build Activities are not deployed
body: <p>Within my teambuild we use custom build process activities, which are deployed at </p>
  
  <pre><code>\BuildProcessTemplates\CustomAssemblies\MyActivities.dll
  </code></pre>
  
  <p>The build controller is configured to load the assemblies from that path.</p>
  
  <p>If I checkin new assemblies, then the teambuild does not load the new assemblies automatically, but uses the old ones. In fact the latest build process template seems to be used, because I get the error: </p>
  
  <pre><code>"TF215097: An error occurred while initializing a build for build definition &lt;myTemplate&gt; Cannot create unknown type &lt;any new type&gt;"
  </code></pre>
  
  <p>If I restart the build controller services, then the latest assemblies are considered.</p>
  
  <p>How can I get teambuild to load automatically the latest assemblies, without being forced to restart the controller?</p>