WPF Performance Toolkit won't attach process

I am using the WPF Toolkit for Windows 7 and .NET 4.5, and running the WPF Performance Toolkit

Whenever I attempt to attach to a process, the application crashes. 

When I debug I get the following Win32 error:{"Not all privileges or groups referenced are assigned to the caller"}

I have attempted to run as an admin, and the error still happens