You may be on a computer that is physically too far away from the Wireless MAXg Access Point. Try moving closer to the Wireless MAXg Access Point and repeating the scan procedure.
Open the Web User Interface of the Access Point, click the Wireless
tab, and make sure the Broadcast network name checkbox is selected. If
the Network name is not being broadcast, the Access Point will not appear during
a site survey scan.
The Wireless MAXg Access Point and clients might be using different 54g modes. If the Wireless MAXg Access Point is set to 802.11b only or 802.11g only, all wireless clients must be capable of using the specified mode. You can set the 54g mode on the Wireless tab, under Transmission.