What are the requirements to get the UI Delays graph in WPA?

I'm looking for the UI Delay graph under the System Activity group but it isn't there. I'm using the WPT from the Windows 8.1 SDK (build 6.3.9600) and tried to profile the application both with base and latency options. The application uses .Net WinForms.

Are there any special requirements to get the UI Delay graph that I may be missing?

Thanks.