[Zope] big problem with emergencyuser ? ??

Hi, i'm under linux, and i use zope 2.5. i had must reinstall zope, because i'd a problem. So i save Data.fs file, uninstall zope and reinstall zope, and remplace Data.fs. all is ok, access to my pages is ok, i can manage, etc... But a problem appears: if i try to add an object -DTML document, Folder ...-, after i write info -id, title...- when i put the Add button or ADD an Edit Button, i have this error: Site Error An error was encountered while publishing this resource. EmergencyUserCannotOwn Error Type: EmergencyUserCannotOwn Error Value: Objects cannot be owned by the emergency user HELPPPPPPPPP Someone can help me? HEEEEEEEEEEEEEEEELLLLLLLLLP (quickly it's possible) Tanks, Blackshack