A problem can occur if a plug-in fails to load. To see which plug-ins are loaded:
Select> > .
Open the PDE Runtime folder.
The Plug-in Registry page lists the Designer plug-ins, which have a green triangle in the plug-in icon.
Use theicon to bring you to the top of the plug-in list.
Select a plug-in, then use the right-arrow icon to drill into the plug-in and use the left arrow icon to return.
Use theicon to refresh the Plug-In Registry view.
Use the Plug-In Registry view toolbar to select.