If you suck does the battery light up? If not, try without the carto - does it light up? Because if not, then you have either not charged the battery or killed the battery (
juice leaks can damage or kill auto
batteries most easily). I recommend you buy KR808D-1 batteries elsewhere where they have manual batteries. (Vaporkings.com has standard batteries, Vapor4Life has more colors, or the new rubberized style is at SmokelessImage or Bloogplanet which have even better sealed manuals)
if the battery DOES light up then get a paper clip and unbend one leg and scrape up lightly on different sides of the center post of the cartomizer to lift it a bit. If you look at the threaded end of a the cartomizer the post is the round raised center section. Using the carto edge as leverage, use the tip of the paperclip leg to lift the post a bit on each side evenly. Then try the carto.