I've just started fly fishing, and i seem to be somewhat getting the hang of casting but the problem i'm having is that when i cast a popper or anything weighing more than a dry fly i get the leader to lay almost perfect, but when i cast a dry fly or any tiny fly the leader doesn't lay but just bunches up as it hits on the water. Now is this cause i have to heavy a leader and need to use a lighter leader for the less heavy flys or what could this possibly be from, thats all i could come up with. thank you

craig