I'm sorry you're running into this behavior. It sounds to me like the load test is hanging during execution and will not abort. Since this is not a known issue, it would help us to get a copy of your test project and access to your application. If it is not possible to grant us access to your application, please take a Fiddler trace and attach it to a support ticket in a .zip file. You can capture a Fiddler trace using FiddlerCap. A Jing video of the behavior may also help us diagnose your issue. We appreciate your help in troubleshooting this behavior.
the Telerik team