Need assistance configuring adapter and access point security settings.
In order to use any of the popular security features, both your client adapter and the access point to which it will associate must be set appropriately. For more information on correctly setting your client adapter and the access point refer to Synchronizing Security Features section of Configuring the Client Adapter.
Refer the following URLs
1. Using EAP authentication in Cisco Aironet 350 and CB20A Wireless LAN Client Adapters Installation and Configuration Guide for Windows
2. Using EAP Authentication in Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide, Release 2.5
Configure / Configuration issues
WLAN adapters (wireless card) / ACU (Aironet Client Utility)