[Zope] no password

Sorry if this question was already answered before but I couldn't find it. I just downloaded Zope 2.5.0 and installed in my computer. I created a user and a password during the installation process. When I access Zope for the first time it simply doesn't accept the password I have just created. I tried to reinstall but the same thing happens. I read in the site that you can change it using the password script but I know nothing about Python. So if anyone could help me. Thanks, Marcelo