Wireless printing stopped working. Belkin router and Epson Stylus NX420.

I have been printing wirelessy without any problems for about a year and two weeks ago the wireless printing stopped working. I updated all software for computer and printer. I installed new cartridges, and I reset the printing system so I can print with a USB cable, but when I uplug the USB the printer won't show up in printer list even though the wireless signal on the printer indicates that it is working. The printer has never been plugged into the router to print wirelessly like it is with an airport, but it has worked without this connection in the past. I am not sure where the communication is getting broken. What else can I do to get communication flowing between router, computer and printer?