Gerth

hi I have a Epson wf-4720. I've downloaded the firmware and the activation software. I have no problem installing the firmware to the wf-4720. but when I try to use the activation software with the purchased activation code I get an error after clicking on the activate online button., what happens is a box opens saying activation tools on the top of the box and wrong ID code in the middle of the box. how can I fix this?