It could be that your batter is too loose. Try adding a teaspoon of flour and stir well. If it still seems thin, add another spoonful until it looks thick enough. You want it thick and lumpy enough to drip off the spoon but not runny. It may also be that your pan is not hot enough. If using an electric griddle, it has to be 350 degrees F. One more thing is that you cannot flip your pancakes until bubbles appear on the surface or they are not firm enough to be flipped.