[mod_python] I don't understand this error

I think the error here has something to do with PyXML or 4Suite, so
this probably isn't an error caused by mod_python, but I don't know
where else to try.  I tried the Python XML-SIG list, and I was told
that this is a common error, and I should ask here.  So here I am...
Anyone recognize this error?

----- Begin Forwarded Message -----
I'm working on a distributed computing project, and I'm trying to
port the server we built to another computer.  On the current server,
our this test code works -- on the new machine it fails...
Apache tests pass, & mod_python tests pass. I get failures on some of
the 4Suite tests.  Any help or advice I can get is greatly appreciated.
Thanks.



OS/BUILD INFO: (NEW)			(OLD)
---------------------------------------------
Red Hat Linux 8.0 3.2-7			Red Hat Linux 7.1 2.96-85
Python 2.2.2-7				Python 2.2.1
PyXML 0.8.2 (without xslt & xpath)      PyXML 0.8.0 (with xslt & xpath)
4Suite 1.0a1				4Suite 0.10.1-1
httpd 2.0.40-11.5			apache 1.3.22-5.7.1
mod_python 3.0.3			mod_python 2.7.1-1
pycrypto 1.9a6				pycrypto 1.9a3
xmlrpclib 1.0.1				xmlrpclib 1.0.1
jonpy 0.05				jonpy 0.04
---------------------------------------------



TEST CODE:
---------------------------------------------
#! /usr/bin/env python
#################################
# pyweb.py
# testing python web handler
#################################

import jon.session as session
import jon.cgi
import jon.modpy as modpy
import xmlrpclib
import sys

# without the next line, this test works.
from xml.dom.ext.reader.Sax2 import FromXml

from mod_python import apache

def handler(req):
        req.content_type = "text/plain"
        req.write("Hello World Wide Web!")
        return apache.OK
---------------------------------------------



CHANGES TO HTTPD.CONF
---------------------------------------------
LoadModule python_module modules/mod_python.so

<Directory /home/mmckerns/public_html>
        AddHandler python-program .py
        PythonHandler pyweb
        PythonPath "sys.path+['/home/mmckerns/public_html']"
        PythonDebug On
</Directory>
---------------------------------------------



ERRORS PRODUCED:
---------------------------------------------
Mod_python error: "PythonHandler pyweb"

Traceback (most recent call last):

  File "/usr/lib/python2.2/site-packages/mod_python/apache.py", line 320,
in HandlerDispatch
    module = import_module(module_name, config)

  File "/usr/lib/python2.2/site-packages/mod_python/apache.py", line 499,
in import_module
    module = imp.load_module(mname, f, p, d)

  File "/home/mmckerns/public_html/pyweb.py", line 9, in ?
    from xml.dom.ext.reader.Sax2 import FromXml

  File "/usr/lib/python2.2/site-packages/_xmlplus/dom/ext/reader/__init__.py",
line 21, in ?
    encoder = codecs.lookup("utf-8")[0] # encode,decode,reader,writer

  File "/var/tmp/python-2.2.2-root/usr/lib/python2.2/encodings/__init__.py",
line 51, in search_function

RuntimeError: cannot unmarshal code objects in restricted execution mode
---------------------------------------------



Please speak slowly, so even I can understand...
I'm Mat.Sci., not Comp.Sci.

---

Mike McKerns
Caltech Materials Science
mmckerns at caltech.edu