Is it possible to use the Profiler on a Silverlight Web Resource

I have seen that you can use the Visual Studio Profiler on a Silverlight project to determine which areas of code are running slowly. I have tried to attach this to the IE process running my Silverlight project in the same way that I attach the debugger, but no luck there.

Is attaching the Profiler in this way possible, and if so, what vital steps are missing?

Thanks :)