I just purchased a new AirPort Extreme with the guest networking feature. I loaded the config from my previous AirPort Extreme and everything seems to be working fine with the exception of the guest networking feature. When I have a guest attempting to log into the guest network, it displays the error: "connection failed". I am able to connect my iPhone(listed MAC in router) to the guest network just fine however, my "guest" laptop that has no MAC address in the router will not connect. It sounds like a MAC ACL issue. I currently have the "(default)" set to no access. Has anyone else run into this issue? I would prefer not to remove security features for convenience sake.