Problems with X3DImporter-alpha.py

I’m sure I’ve successfully used this in the past but now on both 2.48 (Python2.5) and 2.49 (Python2.6) on a win64 machine I get an error message about no parsers found, last line is as follows:

xml.sax._exceptions.SAXReaderNotAvailable: No parsers found

Any help would be gratefully received.

lockan

ps - the X3D file is from ParaView3.6.1