OK, make sure to choose the exact same wi-fi/wireless network name for both the iPad and printer (in iPad, check Settings -> Wi-Fi.)
(Note: If the router has a wireless guest network name, it cannot be used on the printer and iPad for printing. Both printer and iPad must be connected to the regular wireless network name, not guest name.)
Please take your time, then let me know how it goes any time; I will help further as needed. Thank you.