[Zope] Epoz 0.8.1 EpozPostTidy Error

[S. D.]

When I set up an External Method at the root of my Zope installation (Zope
2.6.2, Plone 1.0.5, Win 2K) using these parameters:
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 id=EpozPostTidy
 Module-Name=Epoz.EpozPostTidy
 Function-Name=EpozPostTidy.
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I got this error in the ZMI:
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ErrorType: ImportError
ErrorValue: No module named HTMLParser
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What do I need to do to make EpozPostTidy happy?

Thanks!

Scott