Connecting a printer to my home network

I am trying to connect a printer to my home WiFi network which has an XB8-T gateway/router.  I get an error message "The machine cannot detect a WLAN access point/router that has WPS or AOSS enabled."  When I push the WPS button on the XB8-T, the light is supposed to flash blue while attempting to establish a WPS connection with the printer.  However, when I push the button nothing happens.  When I release the button, I get two brief red flashes.  I'm guessing WPS has not been enabled on the gateway/router (though it is supposed to be enabled by default.)  How do I enable WPS on the XB8-T?