Airlinkplus WLC3010 User Manual page 60

Chapter 7 Troubleshooting
Make sure the SSID for the Wireless LAN Card is the same as the Access Point.
Make sure the security settings are the same as that of Access Point.
Make sure your Wireless LAN Card operation mode is set to Infrastructure.
Make sure you are not trying to connect to an 802.11a Access Point. 802.11a and
802.11b/g standards are not interoperable.
The Access Point has reached its maximum number of supported clients.
If MAC address access control is enabled on the Access Point, make sure the MAC
address of your Wireless LAN Card is not among the deny access list.
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