Enforce consistent access control list across all replicas of this database - Greyed out!

Hi,

I am having problems with my address book replicas that we have set up from one server to another. I am getting the error message “Replication cannot proceed because cannot maintain uniform access control list on replicas” From looking through the Domino Admin help I know that to resolve this I need to uncheck the “Enforce a consistent access control list across all replicas of this database” on the advanced tab on the acl. However it is greyed out! My server has extended acl switched on would this be contributing to this being greyed out? I am a Full Access Admin of the server and even when I switch on my superpowers it still doesn’t let me uncheck the box. Any ideas?

Cheers,

Elle