In this window make sure you are in the "Association" tab.You will need to enter your encryption information here in order to connect to your network.Select your encryption type from the "Network Authentication" and "Data Encryption" drop downs.
If the box was checked, then that was why you were getting the “unable to find a certificate to log you on to the network” message because Windows is looking for one, but your wireless router is not setup for certificate security. Once I unchecked that box and tried to reconnect to the wireless network, everything worked fine! Now click on the Wireless Networks tab and select the network in the list at the bottom.Click on Properties once you select the wireless network that is having problems.I cannot get WPA2 enterprise to work on my network. Windows Domain, using IAS and its own CA Linksys WAP200 Access Point I setup the AP to use WPA2-Enterprise Mixed using RADIUS I setup and registered IAS on the domain controller.I added the AP as a client with and have tried using both RADIUS Standard and Cisco as the RADIUS type.