Airport Extreme printing stopped working
I have been printing wirelessly with a printer's USB cable plugged into an Airport Extreme. Today the wireless printing stopped working, evidently because the Airport Extreme no longer sees the printer:
-- The Airport Utility shows no printer connected the Airport Extreme, so of course...
-- The Epson Printer Utility says the printer is Offline (not connected).
-- And Print & Scan shows the printer Offline (red dot).
However, when I plug the printer's USB cable into a USB hub, the Printer Utility and Print & Scan show the printer as connected and online, and it the printer works fine.
How can I make the Airport Extreme see the USB printer so I can do wireless printing again?
iMac, Mac OS X (10.7.2), 21.5", 12 GB RAM, 500 GB SATA HD