I was having a similar episode with my samsung fridge filter. I realized after looking inside the slot where you insert the cartridge that the wide thread ears on filter and insert were sideways. I was trying to push it in with the handle in my hand straight up and down instead of sideways. After re-inserting the cartridge in sideways in my hand with the thread ears sideways i imediatley heard the water start filling the cartride and thats when i finished pushing in and turning clockwise untill locked in. Filter then dispensed perfactly. Boom done.