Nagiosgrapher debian Lenny

Hi
I’ve installed nagiosgrapher package from repo.
After installing i’ve done steps described in README.Debian

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 Just a few steps to run the grapher ...

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.
 To tell nagios to write service perfdata add these lines to your nagios.cfg:

<------>process_performance_data=1
<------>service_perfdata_command=ngraph-process-service-perfdata-pipe
<------>
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.

But icon did’not appear (((
What else shout be done to make it working?