[Zope] import & export error on.2.9.2 version of zope has been solved

The problem with import and export of zope application from zope2.7.3 to zope2.9.2 has been solved.But when I am sending some request to the server that time It's giving error as follows "Error Type: ImportError Error Value: import of "name of the application" is unauthorized getting this type of error" Is it because of the change in the version of ZODB, in zope2.7.3 they have used the 3.2.4c version ZODB , and in ZOPE2.9.2 used 3.6.0 version ZODB. Sir "Lennart Regebro" has suggested me to copy and paste the data.fs file from Zope2.7.3 where actully my application has developed.Please help me out -- regards Shiv