it didn't work

Sorry, it didn´t work. I did this configuration before with the same result. Devices connected to the lan works fine till I do the last step, when I add an Access Point to connect wireless devices too, the client router disconnects from the main router. I have to remove the Access Point configuration if I want to reconnect with the main router, so only devices connected to lan works again.
The final result is that only works the "client" side but not the "AP" side. I'm afraid that only routers with two radios can use this configuration.
Any help will be appreciated