Acl

Some user shows me that when he goes to:File >> Database >> Access Control List, The dialog did not show (also happen in right click on the icon). When I add access control list button to one of the tool bar the access control dialog show, but from menu or right click still not show. It is happen just in one database. Some one had this problem before, and if yes, did someone solve it, or know what the problem is?

Thanks.