I'm working on an existing C# web application that utilizes the Microsoft Report Server (2.0) add-on to SQL Server 2008, and I've encountered an error that is incredibly frustrating. I'll admit that my primary experience is in Linux with PHP and Apache, so I don't have a lot of experience troubleshooting M$ products.
Sys.WebForms.PageRequestManagerServerErrorException: The permissions granted to user 'IIS APPPOOL\application' are insufficient for performing this operation.
ScriptResource.axd Line: 4723
The application works just fine for the most part, until the point that I attempt to load a page that uses reports from Report Server. I immediately get errors referring to a missing "ClientController" object/id, and the previous error appears once I've clicked the final item that would normally cause some AJAX call (presumably) that leads to the report being displayed.
When I run Visual Studios (2008) on the server itself and start debugging, it can access the reports just fine, so the Report Server is functional.