It appears you're trying to profile your unit test run using the Visual Studio 2013 Performance Profiler. JustMock is not yet integrated with it. Try running the tests regularly without starting a profiling session.
If you need to profile your tests using VS2013, please inform me, so that I can give this story a priority boost.
Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.