Melt the butter in a pot...as soon as it melts add the sugar and Karo...Stir, mix and blend really well..Beat the eggs well...add them to the Sugar, Karo mixture...Again..stir, mix, and blend really well...Stir in the vanilla....Continue per the recipe....It should work! ...
Again the first 5 ingredients must be properly well mixed before you add the pecans....
Have Fun!