[Set ACL in com_users component] my user can manage users !!!

Hello,
I can denied categories manage, types manage, fields manage in flexicontent permissions.
But users can manage user : logout a user or delete a user ...
Where can i deny this management ?
Thanks for your help

Hello

that makes use of the ACL privilege on the component "com_users"
- visit Joomla "Users" or Users/"Manage", then click options and in the Permissions TAB edit the ACL
(clean cache once after changing these)

Ok
That's what i did but it's not enough ...
I denied the cinfigure ACL & options of my parent user groups
like this :

But after clear cache i need to change the permissions of the parent user groups:
1 denied on adminisrtration and try to coonnect
2 allowed on administration and all seems to be OK ...

Very stange no ?