Original Express can't see Extreme Wifi network
I have a new 802.11n Airport Extreme (bought last year) and a very old original 802.11g Airport Express. The Extreme is providing the Wireless network in the house, and it works great. I want to hook the Express up to my stereo so I can use Airplay with it. I tried to set it up to connect to the existing Wifi network, but when I'm configuring it in Airport Utility, it won't see the network, so it can't connect. My iPhone, right next to the Express, can see and conncet to the network just fine.
I have the 2.4 GHz and the 5 GHz network using the same SSID. Do I have to separate those? That would be annoying, but I could possibly live with it.