Hi,

Just solved it myself... If there's more than one database in the instance of OpenERP this should work:

1. Delete all of the other databases if possible

2. Go to settings->technical->automation->scheduled actions and check for the actions that has "Repeat missed" checked. Uncheck them.
   

3. Edit the openerp-server.conf file, and set db_name, db_user and db_password correctly

4. Reboot the odoo instance and check if it's working after it (it may not respond for some minutes if some of the scheduled actions has the "Repeat missed" option checked)