[ArgumentException: The virtual path '/Umbraco%20CMS/default.aspx' maps to another application, which is not allowed.]
   System.Web.VirtualPath.FailIfNotWithinAppRoot() +3116918
   System.Web.HttpContext.RewritePath(String path, Boolean rebaseClientPath) +156
   System.Web.HttpContext.RewritePath(String path) +6
   umbraco.UmbracoDefault.Page_PreInit(Object sender, EventArgs e) +2091
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.EventHandler.Invoke(Object sender, EventArgs e) +0
   System.Web.UI.Page.OnPreInit(EventArgs e) +9009702
   System.Web.UI.Page.PerformPreInit() +31
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +328