[Zope] Disapearing cookies or problems with cookies and chache

Hi, I have an object with two properties. A German one, and a French one. Depending on the settings of a cookie I want the appropriate property content displayed. My problem is, that this seems not to work when the page is served from the local cache. Does anybody have an Idea how to force the display of the correct data. Or do you have a hint why cookies could "disappear" thanks Robert www.redcor.ch