On our Windows XP laptops with Access Connections v5.30, we configure wireless security 802.1x authentication with WPA-2, AES & TLS settings, and we check the "Use client certificate" box. No certificate show up for selection. We enabled autoenrollment on our Windows 2003 Certification Authority Server and was able to push a user certificate to the Windows XP laptop. We use Windows mmc to check the user certificate and it is definitely there.
This problem does not exist on Access Connections v5.2 or below. We have many Access Connections v5.30 and above on our Windows XP laptop, downgrade Access Connections is not an option for us.