said by sunnycrest :
I'm having the same problem. Two computers on, a printer and two iPads with two Airport Base Stations is enough to mess it up.
You can configure one of your Airports to act as a DHCP server. My Time Capsule is setup to distribute IP addresses from 10.0.1.2 - 10.0.1.200
Not having any information about the HT1000 and DHCP, I ran Airport Utility (v. 5.6.1) and made the following selections:
I want to restore this Time Capsule to its factory settings and then set it up again.
I want to create a new wireless network.
I connect to the Internet with a DSL or cable modem using DHCP.
Airport Utility chose to use a fixed IP address (10.0.1.1) for my Time Capsule and configured it as a DHCP server anyway.