well, i think, personally, its pretty hard to pollinate eggplants by hand. in fact, i haven't had much luck with eggplants either. Make sure there is nothing delaying the growth of the
plant or the fruit--such as having the roots or the
plant in a bad place. Maybe the
plant used all its energy up, try fertilizing it, if u already do, try fertilizing it more and give it a little more/less water. maybe its just a flop
plant, but i'm not sure--ill post again if i get any other ideas on why this could be happening! good luck!!