The default IP address for ZoneDirector is 192.168.0.2.
The default IP for an AP is 192.168.0.1. The first AP to join the ZD will connect.
Subsequent APs with the same default 192.168.0.1 IP address will not.
If you have a small network, you can use the DHCP server on the ZoneDirector
for APs and trusted WLAN clients (who will be able to see your ZD/APs).
From the Configure/System page, find the DHCP Server section, and enable the
server, with a range of IP addresses that do not include your ZoneDirector's IP,
like from 192.168.0.100 for 99 IPs.