Visual class development

[cksanjose]

I'm working on a new project using Eclipse Ganymede and Visual Editor
using SWT. When I insert a new Visual Class using SWT's shell type, I
don't see a shell in the editor. The "Loading" message will appear
but the top half of the screen will be blank.
We also have an existing application that is using SWT. When I insert
a Visual Class using SWT's shell type, the shell will render properly
and I can drop SWT controls in it.
What could I be missing on my new project so that the shell will
render properly during design time.

Thanks.
Cesar