please tell me what to do (i don't know to upgrade my python version because i use it with a lot of other applications) In fact, you don't have to replace your old python version, you can install the new one in another folder and use it from zope (assuming that you're using linux or unix).

This nice how-to explains the way it can be done: http://www.zope.org/Members/beacon/install_instructions This how-to doesn't say it, but you also have to uncomment the modules that you need from the Modules/Setup file in the python source code installation (like zlib for example). Note: if your old python is installed under /usr/local, then you can specify another path in the configure script (read the comments inside this file). Regards, Josef