It doesnt work

I have a Samsung M2020 printer connected to my LAN. I have no problem to print wireless from my MacBook. However, Ive almost never been able to use it with my iPhone. AirPrint doesnt find it, nor does Samsungs Mobile Print app. Ive tried turning the printer on/off/on, with no success.

MacMesser about Samsung Mobile Print, v2.03.024