@Shoobee 

Don't know what the 'specs' for your network is, nor the wireless settings?

Suspect this is probably due to using a CHANNEL (Frequency) on the router that your printer may not support? I assume since the Printer is 2.4Ghz only you are transmitting that radio signal? If you are transmitting the SSID, I'd look at the Security? Try 'none' and see if it can see it (although security should only come into play when you try to connect).