[Zope] Import Problem with the zexp-File

Hi! I want to import a file to my Zope Server (version 2.7.4). The *.zexp is from a Zope Server with version 2.8.0. Should it be possible to import the zexp - File from a newer Zope version to an older one? Because, when I try to import the File, I always get the following error: "Errortype: ImportError" "Error value: No module named FileDocument" With best regards, Birgit