fatal error when trying to access user or admin interface

Monday 05 February 2007 3:56:19 am

Hi, i'm working with ez publish 3.8.6 and i'm using a database set up by an ez publish 3.6 installation. all the installation goes fine,but when i try to access the user interface web site (ad even admin interface), i get the following error:

Fatal error: Call to a member function on a non-object in /homepages/0/d188245998/htdocs/kernel/common/eztreemenuoperator.php on line 224
Fatal error: eZ publish did not finish its request

The execution of eZ publish was abruptly ended, the debug output is present below.

May somenone can tell me which is the problem and how i can resolve it ?

Thanks.