I have built an IOS Enhanced Conference Bridge using a Cisco 2811 router with IOS version 12.4(7b) Advanced IP services. The conference bridge works correctly, however when I try to add it to TACACS+ it won't authenticate. It then proceeds to lock me out of the router and won't even allow me to login on the console with the local username. I have been looking through the forums for similar problems, but I haven't found anything yet. Does anyone know if this is an IOS version problem and if so, what IOS should I upgrade to?