[mod_python] psp template problem

It works perfectly on my freebsd system, but not on suse. template.run
doesn't output anything. The template.html file is an exact copy from
the documentation
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from mod_python import apache, psp

def handler(req):
    req.content_type = "text/html"
    req.write("hi<br>")
    req.write(req.filename)
    template = psp.PSP(req, filename='template.html')
    template.run({'what':'world'})
    req.write('<br>after')
    return apache.OK
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Here is the output from a view source in the browser

hi<br>/home/bloc/public_html/controller/index.py<br>after
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