You must use clean and dry corn, as discussed elsewhere in this website, or you will be disappointed in the results. Frequent flameouts and a dirty, sooty, lower temperture flame requiring frequent stove maintenance will be the likely outcomes of using poor quality fuel. If you think about it, this is no different than with many other fuel types - QUALITY COUNTS!

Aside from corn quality the other big factor is air/fuel mixture in the fire chamber. Too much air may result in the corn being burned up too rapidly resulting in a flameout. Also, excess flue tempertures may be detected with too much combustion air because heat is being sent out the flue instead of being transferred through the heat exchanger into the room.
Too little air will result in a dirty (sooty) orange flame producing less available heat and the fire may be smothered with unburned corn. This is because the fire is starving from a lack of sufficent oxygen for complete combustion (burning) of the corn fuel. This condition wil also cause rapid build-up of soot in the flue. If your home is super tight you will need to pipe outside combustion air directly into your stove.

Proper air mixture combined with high quality corn fuel will often result in a strong flame showing blue coloring, much like a properly adjusted welder's torch. This is an excellent indicator of efficent combustion of the fuel producing the highest possible BTU output.

Study your owner's manual well concerning proper air/fuel settings. Then be prepared to spend time adjusting both until you determine the best settings for your installation. You will almost cetainly be rewarded for your patience with a hotter, cleaner flame requiring less stove maintenance.