If you downloaded and installed a Juno spin setup for Android, most likely it doesn't have the
J2EE plugins. J2EE support - and for that matter, even basic
Java support - isn't build into Eclipse. It's done via plugins, and the various Eclipse spins have different plugin sets.
You should probably download and install Juno for J2EE and then install the Android plugins into it. I'm not sure how much work it would be to upgrade a copy of the Android spin for J2EE support, but I suspect it's considerable.
The secret of how to be miserable is to constantly expect things are going to happen the way that they are "supposed" to happen.
You can have faith, which carries the understanding that you may be disappointed. Then there's being a willfully-blind idiot, which virtually guarantees it.