can't connect to wifi printer.

Since upgrading to BT Infinity I haven't been able to connect to my wifi printer (Epson Stylus SX535WD). The new home hub is up and running but I can't see how to connect to the printer. When I go to the printer's set-up mode and select 'Wifi Auto-Connect', I get the error message: 'No computer found. Check wifi/network device and condition. Try again.'

I tried deselecting the printer from the Mac's printer list, with the idea of adding it again, but now no printers appear at all when I press the + button. So first I need to add the printer once again and then find how to connect to it. I'm using OS X (10.8.5). Any ideas anyone?