title: Web Site Administration Tool Not Working with ASP.NET MVC
body: <p>I'm just starting with ASP.NET MVC and I was trying the Authentication with this new architecture. </p>
  
  <p>So, I started following a tutorial in the official site and, while I was trying to add some users through the Web Site Administration Tool, I found this error:</p>
  
  <blockquote>
    <p>There is a problem with your selected data store. This can be caused by 
    an invalid server name or credentials, or by insufficient permission. 
    It can also be caused by the role manager feature not being enabled. 
    Click the button below to be redirected to a page where you can choose 
    a new data store.</p>
    
    <p>The following message may help in diagnosing the problem: Could not load type
    'MyMvcApp.MvcApplication'.</p>
  </blockquote>
  
  <p>Now, the only thing I changed in the web.config was the connection string and, I'm sure the connection string is not the problem (is the same I'm using in other project).</p>
  
  <p><strong>EDIT</strong>: Here is the connection string: <code>"Data Source=myMachine\SqlExpress;Initial Catalog=TestDB;User ID=TestUser;Password=123456"</code></p>
  
  <p>I tried several things and googled a lot, but nothing worked.</p>
  
  <p>So, any ideas? as I said, I did not change anything in the web.config besides the connection string.</p>
  
  <p>Thanks in advance,</p>