[Paraview] plugin through server manager configuration xml

[pratik]

Hi,
I copied the code for vtkCellDerivatives.xml given here:
http://paraview.org/Wiki/Plugin_HowTo#Enabling_an_existing_VTK_filter
verbatim and loaded it into PV 3.10.1 through the plugin manager, but 
the filter does not appear on the filters->alphabetical tab.
Is there something else that I have to do to get the filter to appear?

pratik