title: Problem with WCF Ria Services RequiresRole attribute
body: <p>I have a User class that implemented the IUser interface and is used in the AuthenticationService of my WCF RIA app.</p>
  
  <p>Whenever I apply the RequiresRole attribute to one of my operations I get Access to the operation is denied error even though WebContext.User.IsInRole("Managers") on the client side returns true.</p>
  
  <p>Does anyone know why I get this error?</p>
  
  <p>Thanks.</p>