[Zope] how to use the dsv and csv in Zope?

I'm learning the ZOPE, but have met much problems.I have installed "plone" in my system Window XP, and have created a dadabase on my zope.I want to put it into csv, so I have downloaded DSV 1.4.0 from the site of zope, and put it into my folder /zope/lib/phthon/products, but I can not find it in the "select type to add..."of root folder, would you please help me? Thank you very much! LEI zhiyi