title: CRM2011 Plugin tool not allowing update of existing DLL
body: <p>I am currently having a problem where when I try to update an existing DLL, if I update it with the location of Database then I have the following error being returned:</p>
  
  <p><strong>Error Code:</strong> 2147204725</p>
  
  <p><strong>Message:</strong>  Plug-in assembly does not contain the required types or assembly content cannot be updated</p>
  
  <p>However if I try to use the disk location option then I have a different error message:</p>
  
  <p><strong>Error Code:</strong> 2147220906</p>
  
  <p><strong>Message:</strong> Assembly must be registered in isolation.</p>
  
  <p>Yet I do not understand why this is.  Currently I have tried the following:</p>
  
  <ul>
  <li><p>Making sure I am a Deployment Manager (I am not deploying to a Sandbox, as I am trying to update the existing one that is on the server.)</p></li>
  <li><p>A colleague who is able to update the plugin has sent me the DLL which he has checked works, to ensure that it is not the DLL that is the problem</p></li>
  <li><p>I have tried using the plugin tool on the colleagues computer, to ensure that the version is not the problem - but it still does not work for me.</p></li>
  <li><p>The colleague has tried to use the plugin tool on my machine.  However when they do then they get the same errors as I do (although on their machine it works just fine for them but not myself)</p></li>
  </ul>
  
  <p>Does anyone have any suggestions on what could be my problem and why I can't seem to update a plugin on my machine?</p>
  
  <p>Thanks </p>