Dell 1320c will not print - either on network or diect via USB

This printer has worked without a hitch for quite some time. We print to it wirelessly via our home network through a NetGear WNR834B wireless router. We have two Windows-based laptops and one MacBook Pro on the network and all have had no previous trouble communicating with the printer.

A couple of weeks ago, I tried to switch to an Apple Time Capsule router. The Windows and Mac laptops all communicated fine with the router and the printer showed up, but none could communicate with it. I was leaving town the next day. So that my family would be able to print while I was away, I switched back to the NetGear router, but still could not communicate with the printer.

Today, I tried to print directly via USB. Same result: "Unable to connect to printer..."

I tried reinstalling the driver. No change. Ideas?