AX does not hand out ip addresses in roaming mode

I am trying to set up roaming network in my house using a Airport Extreme as the main router and a ethernet connected (via Powerline HD) Airport Express on the second floor of my house. I followed the usual instructions to set up the Airport Express to create wireless network in bridge mode.  The Express allows clients to connect and accepts the password but does not hand out ip addresses. so the roaming device (an ipad and an Air) end up with self-assigned addresses in the 169.*.*.* range.
How do I correct this?
option click on the Air wifi symbol shows that its corrected to the correct wifi base station
Airport Utility sees both the main Extreme base station and the Express second floor base station, and neither reports any problems.
Thanks.

I am trying to set up roaming network in my house using a Airport Extreme as the main router and a ethernet connected (via Powerline HD) Airport Express on the second floor of my house. I followed the usual instructions to set up the Airport Express to create wireless network in bridge mode.  The Express allows clients to connect and accepts the password but does not hand out ip addresses.
Actually, with the AirPort Express in bridge mode, the AirPort Extreme would be the router "handing out" the IP addresses as they would just be "passing through" the Express in this configuration.
Let's double-check your roaming network configuration, just to be sure nothing was missed.
Roaming Network Setup
Ref: See page 42 of the Apple AirPort Networks guide.
Setup the AirPort connected to the Internet to "Share a public IP address." Internet > Internet Connection > Connection Sharing: Share a public IP address
Setup the remaining AirPorts, as bridges. Internet > Internet Connection > Connection Sharing: Off (Bridge Mode) For each AEBSn in the roaming network:
For each base station:
Connect to the same subnet of the Ethernet network.
Provide a unique Base Station Name.
The Network Name (SSID) should be identical.
If using security, use the same security type (WEP, WPA, etc.) and password. Note: It is highly recommended that you use WPA2 Personal for best bandwidth performance.
Make sure that the channel is set at least three channels apart from the next base station to prevent Wi-Fi interference.

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