title: Creating application in IIS7 Manager fails
body: <p>We have an application which is set up on IIS7 on Server 2008 R2 x64, using ASP.NET 3.5 SP1.<br>
  The default site is currently being loaded off of a UNC on another server, and is working fine. </p>
  
  <p>I now need to add another application underneath that application which points to a different folder <em>on the same UNC share</em>. </p>
  
  <p>I right-click on the website, and click to add an application; I specify the alias and physical path, and click OK, and get the following error: </p>
  
  <blockquote>
    <p>There was an error while performing this operation. </p>
    
    <p>Details: </p>
    
    <p>Filename: \\?\UNC\wmsclusterfs\wwwroot\applicationHost.config<br>
       Error: Cannot write configuration file</p>
  </blockquote>
  
  <p>(screenie here: <a href="http://www.box.net/shared/4pt2lxh7hz" rel="nofollow noreferrer">http://www.box.net/shared/4pt2lxh7hz</a> )</p>
  
  <p>I have tried the "Connect as..." to specify a user who has writes to the directory, no luck.<br>
  I get the same error if I try to create it as a virtual directory.<br>
  The UNC is being referenced via a mapped drive. 
  IIS is "clustered" via MS Cluster Server.</p>