Printing via WiFi on Epson SX515W

Hi

I have a new laptop which has Windows 8. I also have an Epson SX515W printer.

The printer works perfectly and I had it printing via WiFi on my old (no longer have) laptop running Windows 7.

I have managed to et drivers for the SX515W printer from Epson. Yesterday I spent ages contacting Epson via their chat on their website and they eventually for my SX515W printer printing via WiFi for me.

Today it no longer prints via WiFi! I've plugged the USB cable in and am currently printing that way.

Can somebody help me get the SX515W printer printing via WiFi again?

Thanks

Dave