Samsung ML 1640

1) i am using a commercial toner [aumTEO: toner for use in samsung ML 1710, 1750, 1410, 1510] and one of my ideas is that this kinda toner would overheats the cartridge, therefore activating a thermal sensor, telling the printer to stop printing.

2) while refilling the cartridge... stupid me slipped a good amount of toner inside the green drum [i know... don't laugh too hard please :P ]... so... the toner being present there might overheat the cartridge activating the same thermal sensor i'm thinking about.

3) none of the above... the pages are too curved, therefore making the whole paper feeding process a lil bit more difficult

if i'm just being dumb.