How to update Account.Attributes StaffAssignmentDisabled/ViewReportsDisabled?

Content

I am able to update AccountLocked but StaffAssignmentDisabled and ViewReportsDisabled won't update.  Is there a special way you have to update these fields?

Code Snippet

             //works
ao.AccountLocked = true;
ao.AccountLockedSpecified = true;

//doesn't work
ao.StaffAssignmentDisabledSpecified = true;
ao.ViewsReportsDisabledSpecified = true;

ao.StaffAssignmentDisabled = false;
ao.ViewsReportsDisabled = false;