or
Error: System.Reflection.TargetInvocationException : An exception occurred during the operation, making the result invalid. Check InnerException for exception details. em System.ComponentModel.AsyncCompletedEventArgs.RaiseExceptionIfNecessary() em Telerik.Reporting.Service.SilverlightClient.ListRenderingExtensionsEventArgs.get_Extensions() em Telerik.ReportViewer.Silverlight.ReportViewerModel.OnListRenderingExtensionsCompleted(Object sender, ListRenderingExtensionsEventArgs e)------------- InnerException: -------------System.ServiceModel.CommunicationException : The remote server returned an error: NotFound. em System.ServiceModel.Channels.Remoting.RealProxy.Invoke(Object[] args) em proxy_3.EndListRenderingExtensions(IAsyncResult ) em Telerik.Reporting.Service.SilverlightClient.ReportServiceClient.OnEndListRenderingExtensions(IAsyncResult result) em System.ServiceModel.ClientBase`1.OnAsyncCallCompleted(IAsyncResult result)------------- InnerException: -------------System.Net.WebException : The remote server returned an error: NotFound. em System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state) em System.Net.Browser.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult) em System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelAsyncRequest.CompleteGetResponse(IAsyncResult result)------------- InnerException: -------------System.Net.WebException : The remote server returned an error: NotFound. em System.Net.Browser.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult) em System.Net.Browser.BrowserHttpWebRequest.<>c__DisplayClassa.<EndGetResponse>b__9(Object sendState) em System.Net.Browser.AsyncHelper.<>c__DisplayClass4.<BeginOnUI>b__1(Object sendState)<ul> <li>..</li> <li>..</li> <ul> <li>...</li> <li>...</li> </ul></ul>