I have been able to setup EAP-TLS with Windows XP using the Windows network settings. I would like to use the Aironet Client Utility to control my profiles as it offers more configurability and information.
I create a profile in the ACU with the SSID, Dynamic WEP, and select Host Based EAP from the Network Security Type drop-down menu. When I enable this profile, I lose all network connectivity. I have tried this with the 'Use Windows to configure my wireless network settings' checkbox both checked and unchecked and I have not removed any of the settings for this SSID from the Windows networking.