We have a c35 controller and netsight I am just trying right now to make a simple connection to the nac through a vns wlan service. I have set up the radius under authentication for the NAC. IN NAC manager I am able to verify the NAC connection. I have set up the AAA I believe correctly. When I try to connect a client I get a message on client wrong user name and password but in the logs of the controller I see a message that there is no Radius server available for WLAN. There has to be something I am missing but I have no idea what. I can send you what ever screen shots you may need to help. Thanks for any help. This has been very frustrating process.