AirPort Utility 6.3.2 doesn't see older AirPort Base Station
I have an old AirPort Base Station (2001 model, Dual Ethernet, "Snow", actually not "Graphite", though apparently that's the correct category here), which was previously configured with my MacBook Pro running MAC OS X 10.6.8. I've just started it up, with the DSL modem connected to it, and I'm able to connect to it (and get Internet) from my new MacBook Pro running 10.9.4 just fine. However, the latest AirPort Utility v.6.3.2 doesn't see it, says "No configured AirPort base stations have been found. AirPort Utility will continue searching." – although its window does show a green button next to the word Internet, showing (I assume) that there's an Internet connection. Does anybody know how to configure an old APBS like this from 10.9.4? AirPort Utility v.5.6.1 apparently can't be used with 10.9; is there a version that can, and will see this older AirPort Base Station?
MacBook Pro, OS X Mavericks (10.9.4), 2.4GHz (2013), 8GB RAM, 256GB SSD