[Spambayes] Lotus Notes filter error KeyError: ('Hammie', 'header_spam_string')

[Mike Smith]

Help!  My company has just switched from Outlook to Lotus Notes.  I receive > 300 spam daily, which was managed quite well by the Outlook plug-in, but now it's out of control until I get the notes filter working.  I am runnnig Lotus Notes 5.0.11 on Windows 2000.  Here is what I have done:

Downloaded and installed Python version 2.3.2
Downloaded spambayes-1.0a7.zip, unzipped and ran setup.py build and setup.py install
In notes, created folder spam, with subfolders Ham, Spam, Train as Ham, Train as Spam
Replicated notes to local database msmith1.nsf

Now, if I run sb_notesfilter.py to classify only (no training has been done yet), I get the following:
0 documents processed
   0 classified as spam
   0 classified as ham
   0 classified as unsure
The Spambayes database currently has 0 Spam and 0 Ham

When I try to train, it dies.  Here is the command I'm entering:
C:\Program Files\Python23\Scripts>sb_notesfilter.py -t -d spambayes -l c:\apps\N
otes\Data\msmith1.nsf -f spam

Here is the Traceback:
Traceback (most recent call last):
  File "C:\Program Files\Python23\Scripts\sb_notesfilter.py", line 384, in ?
    sbfname, doTrain, doClassify)
  File "C:\Program Files\Python23\Scripts\sb_notesfilter.py", line 321, in run
    processAndTrain(vtrainspam, vspam, bayes, True, notesindex)
  File "C:\Program Files\Python23\Scripts\sb_notesfilter.py", line 237, in proce
ssAndTrain
    str = options["Hammie", "header_spam_string"]
  File "C:\PROGRA~1\Python23\lib\site-packages\spambayes\OptionsClass.py", line
562, in __getitem__
    return self.get(key[0], key[1])
  File "C:\PROGRA~1\Python23\lib\site-packages\spambayes\OptionsClass.py", line
559, in get
    return self.get_option(sect, opt).get()
  File "C:\PROGRA~1\Python23\lib\site-packages\spambayes\OptionsClass.py", line
553, in get_option
    return self._options[sect, opt]
KeyError: ('Hammie', 'header_spam_string

Am I missing something?