[xwiki-users] failed to execute velocity macros

Hi all, I've got a problem with my xwiki build right now. I configured LDAP and gave my LDAP user all the rights on the wiki, but I forgot to make him the owner of the wiki. After that I logged in with the LDAP user and deleted the old admin account and tried to set my LDAP user as owner of the wiki. Now every page shows this message: Failed to execute the [velocity] macro. Cause: [The execution of the [velocity] script macro is not allowed. Check the rights of its last author or the parameters if it's rendered from another script.]. Click on this message for details. Even the superuser account can't see the pages normally. What can I do? Is there a setting to give velocity macro rights to everybody? Or can I edit the database somehow?... Thanks, Tom