Profiling application deployed on Glassfish

Hi
I'm using Eclipse to deploy my application (Ejb and Web) to a Glassfish v2 server. This works fine, but I have not managed to do any profiling, normally when you right-click on the server you have an option saying 'Profile'. (Next to start, debug, publish etc.). But the profile option is grayed out for me.
Doesn't Glassfish support profiling mode? It works fine with for instance Jboss.

Thanks, Jim