Have to re-configure Airport Express with EVERY reboot ... what's the problem?

[mgpg89]

I have a network set up at home with an Airport Extreme.

I use an AirPort Express to connect to the same network (wireless) and connect to my MBP with an ethernet cable (so I can use it in clamshell mode ... otherwise the wireless reception is really bad)


But each time I reboot, the airport won't work.
I have to launch airport utility each time and reconfigure the device to connect to an existing network etc ...

Only after doing that, it recognizes the Airport Extreme and the other Airport express in the network (we use that one for wireless printing)



Does anyone know what the problem is?

 

[mgpg89]

UPDATE:

Another problem.
I can't seem to connect to the other Macs in my network (they're connected wirelessly to the Extreme and I am connected via ethernet to the Express that's connected wirelessly to the Extreme) nor can I use the shared printers in the network.

Help?!

 

[mgpg89]

Anyone ... ?