[Paraview] plugin error

[胡健]

hello all:
    I want to add vtkOpenGLHAVSVolumeMapper to paraview as a plugin! here is
my xml file:
when I run paraview and load the plugin and open a data, the program will
give me an error message

 "ERROR: In
..\..\..\ParaView-3.8.1\Servers\ServerManager\vtkSMProxyManager.cxx, line
369
vtkSMProxyManager (0BC34AB8): No proxy that matches: group=mappers and
proxy=OpenGLHAVSVolumeMapper were found.

ERROR: In ..\..\..\ParaView-3.8.1\Servers\ServerManager\vtkSMProxy.cxx, line
1979
vtkSMSourceProxy (13476AF0): Base interface cannot be found.".

 anybody know what's wrong with it?any help will be appreciate! thank you!
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