having issue with the stapler for the mx-fn19 is jamming a lot. i tried changing staple cartridges and even triple checked the staples installed (AR-SC2). i can manually feed a sheet of staples and it feeds just fine for a few days then it stars jamming again. we i get to the machine looks like the staples just wont feed properly as i see the marks on the bottom of the staples where the cartridge tried t move the staples forward. i have also replaced the stapler as a unit but issue keeps returning. also preformed adjustments in tech tip 1119. have had this issue on both the mx-m654n and the mx-m754n, firmware is up to date.