Hiya, the one downstairs does work with the cable yeah and the one upstairs did work with the wireless dongle before i introduced the one downstairs!
It's driving me nuts!  I've just bought another dongle for the one downstairs and it won't connect with that either.  It scans but doesn't find a network.  Same with the one upstairs!  It's asif the dongle isn't connected but it is!  I have to totally turn off the downstairs one before the upstairs one will work.
Is there something I have to do on the router or some other configuration?  F5d7633-4 is the model.