[Zope] moving extfile instances across different zope installations...

[Sreekanth S Rameshaiah]

Dear all,
Greetings !
I have installed extfile product in my development server. The completed
application has to be moved to a production server now. After i moved
all the images to var/reposit folder of the production server, i  moved
the extfile instances using export/import of application's zexp . On
restarting the production server extfile instances are broken.
Hoe do I fix this?
Regards,
 - sree