[mod_python] plotting modpython

Hello,

I'm working with modpython and I need to draw some statistic, so my choise
was about matplotlib.
so when execute this example :

#########################
from pylab import *
import matplotlib
matplotlib.use('Agg')

plot([1,2,3,4])
savefig('test')
#########################

I got a Runtime error :
RuntimeError: Could not open file test.png

does any one experienced with pylab and modpython ?
Thank you in advance,

-- 
Handrix
Network Engineering/Security
http://securynix.co.cc/
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