My network is not finding my 'configured' airport express, help? Also, I want to use it to connect to my network as a client, can anyone help me do this (step by step?)

Please check out the following Apple Support article for details on configuring your AirPort Express as a wireless client.

That article seems to be about physically connecting the Airport Express to a device with no Wi-Fi capability.

I'm having the same issue as Sandi: I just bought a new Time Machine to replace my previous router....and now my Airport Express isn't found by Airport Utility.

Any other suggestions?