Problem with MacBook Air connecting to Epson Stylus sx600fw wirelessly

Hi

I have been trying to set up my new Macbook Air with Epson Stylus sx600fw. Previously this printer was being used via USB with a PC. I have set up the printer on macbook via USB, but under the advice of online resources, erased that and began trying to set it up for wifi use. The printer cannot be found in the Print & Scan section of settings, and when i enter it in manually with IP address, it can find the software to install but gets stuck and says "Unable to verify the printer on your network". After further research i have tried to Ping the printer, which does not work. One thing that i notice is that the Subnet Mask is different than the apple default...for the printer it is 255.255.0.0, where for apple it is 255.255.255.0 but i dont know how to change this 😟

Any advice for where it might be getting stuck or what I can do?

thanks!!!