I dont know if this will help your situation. This is what i do. Use defualt authenticate. Say you have 10 clients registered, right click on their registration and copy to access list. Once you have done this uncheck the default authenticate and apply make sure to check registartion and make sure all clients are registerd. Hide SSID so you have to know SSID to find signal. Add a MAC for site survey van or whatever you may do. Maybe helps. i havent had network cracked through wireless yet