It is hard to figure out what is wrong without knowing what model combine and size of head you have and condition of cylinder bars etc., but I know I would have a hard time running cornstalks through my combine. I remember turning too close to cornrows while cutting soys and plugging the combine on about a dozen cornstalks. That was a few years ago so I dont remember what combine I had at the time, but I did learn to stay away from corn when running a bean head.