[Zope] matplotlib and zope problem

Hello All, I've been using zope and matplotlib for some time now, and I want to connect them. I'am using the example code from page: http://www.scipy.org/Cookbook/Matplotlib/Matplotlib_and_Zope , but whenever I try to import matplotlib, and/or pylab packages i get this error from zope: Error Type: RuntimeError Error Value: '/' is not a writable dir; you must set environment variable HOME to be a writable dir Have You got any ideas, on what might go wrong? I'am using matplotlib 0.87.4, and zope 2.9.5 with python 2.4.3 on gentoo linux box. Thanks in advance for any help. Marek Szczypinski