Unable to Edit Page Restrictions in Confluence

I am unable to set any Page restrictions for any pages in any space. I am in the Confluence Administrators group and I have checked to make sure that the group and myself as an indivdual have the restrict page rights for that space. I edit the page, then choose the "Restriction: Edit" link, I click on Person, search for the person, click on the check box next to that person, click select user, and nothing happens. Also when I go under Tools and click on Restrictions, nothing happens either (there is a lock next to the option).

Several IT people including myself have looked at this and we are baffled. Can you assist?

I am attaching a screen shot of the space permissions.