[mod_python] can't get mod_python to work: newbie - help, please

Hello,

I'm using Fedora Core 1, Apache 1.3.29, mod_python-2.7.10, python-2.3.3

httpd.conf:
<Directory /usr/local/apache/htdocs/test>
        AddHandler mod_python .py
        PythonHandler mptest
        PythonDebug On
</Directory>


mptest.py:

from mod_python import apache

def handler(req):
    req.write("Hello World!")
    return apache.OK


Pointing browser to mptest.py i get instead of "Hello World!" source
code of mptest.py
What may be the problem?

Any help is very appreciated.
Thanks in advance

Best regards,
Ruslan