[Zope] ParsedXML trouble

[List Subscriber @ Neurobs]

Hi,
I just downloaded and installed ParsedXML 1.0 on my RH 7.2, and when I 
started up Zope I got a warning:

***
WARNING: Python C API version mismatch for module pyexpat:
        This Python has API version 1010, module pyexpat has version 1007.
***

As per instructions I had installed it using python1.5. On firing up 
python1.5 I got:

***
Python 1.5.2 (#1, Jul 5 2001, 03:02:19) [GCC 2.96 20000731 (...)]
***

The ParsedXML product showed up in my products list unbroken and intact.

When I tried to add a ParsedXML object in a folder I get:

***

Error Type: SystemError
Error Value: Python/compile.c:265: bad argument to internal function

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Traceback (innermost last):
  File /var/local/zope/leonardo/lib/python/ZPublisher/Publish.py, line 150, in publish_module
  File /var/local/zope/leonardo/lib/python/ZPublisher/Publish.py, line 114, in publish
  File /var/local/zope/leonardo/lib/python/Zope/__init__.py, line 159, in zpublisher_exception_hook
  File /var/local/zope/leonardo/lib/python/ZPublisher/Publish.py, line 98, in publish
  File /var/local/zope/leonardo/lib/python/ZPublisher/mapply.py, line 88, in mapply
    (Object: manage_addParsedXML)
  File /var/local/zope/leonardo/lib/python/ZPublisher/Publish.py, line 39, in call_object
    (Object: manage_addParsedXML)
  File /var/local/zope/leonardo/lib/python/Products/ParsedXML/ParsedXML.py, line 120, in manage_addParsedXML
  File /var/local/zope/leonardo/lib/python/Products/ParsedXML/ParsedXML.py, line 189, in __init__
    (Object: dada)
  File /var/local/zope/leonardo/lib/python/Products/ParsedXML/ParsedXML.py, line 147, in createDOMDocument
  File /var/local/zope/leonardo/lib/python/Products/ParsedXML/DOM/ExpatBuilder.py, line 778, in parse
  File /var/local/zope/leonardo/lib/python/Products/ParsedXML/DOM/ExpatBuilder.py, line 193, in parseFile
SystemError: (see above)

***

What is the problem?? What am I doing wrong here??
TIA
AM